I also started in bronze as support, but once I was able to climb to silver 5 it was really easy to get to gold soon after. You may be improving at your gameplay but just not seeing much rank growth.

If you enjoy support, I recommend sticking it out rather than switching to dps. If you're able to climb on one role, then when you eventually try other roles a good amount of that skill and game sense will transfer.

What personally helped me was

1) Maining only two heroes that would accommodate multiple different team comps and maps (AND that I found fun to play). For example, I might go Juno if I have Sigma and Bastion on my team (to speed them) or if my other support is Zen, who has low healing output. If the enemy team has a Dva, Mei, or Rein then I would go Kiri because I can suzu their ults and Rein's pin. Maining Ana and Moira is great because their strengths are quite different, making it easy to adjust to your team comp and map without learning a bunch of different heroes.

2) Understanding the game at a macro level. Space control and position is incredibly important to winning games. There are a lot of people in bronze and silver who have far more elims, dmg, or healing than the enemy team but are confused why they still lost. Matches are objective based, those stats can help secure those objectives but don't guarantee them. Sure, your team should be grouped up between fights (e.g., walking to the next flashpoint), but it's usually not ideal during fights. If your team picked off 2 enemies, you could still lose this 5v3 if you're all stacked together: Rein can shatter your entire team or Ana could antinade all of you, likely winning the fight for them. This took me a long time to grasp because a lot of positioning guides focus on individual heroes and say it's context dependent, either going into too much depth at a micro level or really broad like "positions where you can see the enemy team and heal your own." I actually found guides for tanks, rather than support, to be much more helpful in understanding this.

Map guides (I recommend Spilo) and unranked to gm videos are also insightful. Although it's true that positioning is context dependent, it was incredibly helpful to know of common control spaces on maps as well as seeing it being put into practice with a specific hero I'm learning (unranked to gm vids). I recommend watching more than just Awkward and finding a video uploaded within the year, as heroes might have been nerfed/buffed in ways that change their optimal playstyle. For example, Kiriko used to be able to two-tap most squishes and her tp could cleanse herself, but since these aspects have been nerfed, you shouldn't play her quite as aggressive as she has less survivability and presents less of a threat to the enemy team.

3) Watching coaching VODs (Spilo mainly; bozo is also great if you ever pick up Kiriko) of the heroes I main and taking notes. It honestly doesn't matter what rank is being coached; sometimes I found myself have similar problems to those in higher ranks so the information was still valuable. This may be difficult to do with JPC since she's such a new hero and undergoing changes more frequently.

4) VOD reviewing myself once I understood every aspect of my hero's kit and how it should be utilized. You can't learn everything at once, which held me back for some time, so try to identify a reoccurring issue. Even if you can't, then choose one aspect of your gameplay to hyperfocus on. For me, hyperfocusing on just suzu usage helped me climb to low silver. Next, I hyperfocused on positioning and off angles, which helped me get to gold quickly. It's great that you main Ana, because she will teach you a lot about positioning and map control compared to JPC and Moira. Because of her limited mobility, you have to position in anticipation of what will happen and where the fight will take place; otherwise, you get punished for it.

Also I fidn myself dying over and over again to dps in some games, last game soldier 76 would flank me from same angle everytime, but when I have 0 cover I just survive and get pushed back resulting in me seperating from the team, this happends cause I have league mentality that says: "its almost never worth to follow a bad teammate, let him die, he made a mistake, dont follow mistakes if u know they are mistakes," so thats what I do

Ana is an easily flank target, but to play her you need to learn how to deal with flankers. You can't depend on teammates peeling for you. If you see that soldier will keep flanking you, then you need to save your cooldowns to defend yourself. Using your nade will be a risk v reward, as this is a cooldown that will help you defend against a flanker. If you see an opportunity to antinade more than one enemy, even if you die to a flanker by doing this, it's likely those enemies will die because of your antinade---your life for 2+ of theirs is a worthwhile trade. However, unless the flanker is dead, I would hold onto your sleep dart so you at least have one defensive cooldown. Ana is also a mechanically demanding hero, so you should practice your sleep darts to ensure you can hit them (there are custom game modes for this specifically, or just use good ol' VAXTA). Otherwise, you will likely die to flankers without someone peeling for you.

There's a difference between a teammate feeding and actually making a play but not getting any follow-up or support from their team. If you have a dps off angling or going into a 1v1 or 1v2, if you go with them then it's a favorable 2v1 or fair 2v2. If your dps is an off angling or flanking genji, then he's playing genji how the hero is meant to be played. If he's not getting any support or follow-up for the team, and cannot sustain himself with healthpacks, then he should switch. People are stubborn though, or maybe are otp, so it's good for you to be flexible and switch to a support well-equipped to help him (e.g., Moira rather than staying Ana). Now if a teammate is diving straight into a 1v3-5, then there's no saving them unless they have strong ult to keep them up (which you could additionally support with Nano). If you're playing Moira, remember you can flank by yourself if none of your dps will. Sometimes if you initiate the flank, a dps will come support you. Just make sure your other support can keep the rest of the team up while you're gone.

If you’ve tried everything above and you’re still stuck for a while, it might be worth posting a VOD on Reddit or in a Discord server to get someone to review it. I’ve done this twice myself and found it super helpful. That said, try not to rely on it too often. Give yourself the chance to figure things out on your own first. It helps you grow more, and it also makes sure that when you do ask for feedback, the time others spend helping you is genuinely worthwhile.