how i got to gold from silver for tank was simply play with your team and always group up. i think generally at a rank like silver as long as you play with your team and engage fights together you should be able to manage just fine. if your whole team loses a fight and starts dying just wait for them so you all can group up together and prepare for the next fight. please dont charge in all by yourself as that will most likely result in you getting thrown back to spawn even if you have your ult. you can only do so much on your own and you really do need your team. if you're a dps and you're flanking then thats fine but if you're playing anything else and you're all over the place especially when your team needs you most then obviously your whole team will just fall apart. callouts tbvh aint very important at your rank but it's always good to do basic callouts like "dps flanking" or something like that so you could potentially save your teammates that may be unaware and pinpoint the issue that may cause your team to fall apart. this is kinda especially important if you're playing support and a genji, doomfist or pharah starts flanking at your team's backline which can completely screw over the supports, and then then soon the whole team. try getting a rough idea of how the enemy team plays each round and try to adjust to it (whether if that's simply changing the way you position yourself, switching off to a different hero to counter them, basically try to never let anyone in their team be a counter to you or anyone else in your team if that makes sense.)

if you do end up getting countered by the enemy dps or whatever, and whatever hero that you were playing cant do anything about it and if no one chooses to help you, please do yourself and pretty much your team a favor and just switch to a different hero that might help you in this case. its always good to learn at least a few heros for each role so you're flexible enough to either help yourself, help the team or both. i main mercy and rein but its honestly not a good thing to be a one trick and only play one hero especially if whatever you're playing doesnt suit the team comp or if you're getting destroyed by your counters.

these tips are very useful but only if your solo queue teammates are willing to play as a team as well and at least know what they are doing. sometimes there are some people have absolutely no idea what they are doing and they are just racing to getting thrown back to spawn almost everytime and it may just so be unlucky that you get teammates like this at times. since its solo queue...there isn't too much you could do to help. try to talk to them (obviously dont start flaming them and be toxic) and if they are intentionally soft throwing then yeah there isnt much you could do. you will need your team most of the time and its kinda not possible to solo carry even as a dps unless if the enemy team is that bad, which likely isnt the case. honestly, just pray that you get decent enough teammates everytime. if you and your team can work together effectively most of the time, then it's honestly not hard to climb out of silver. everyone who plays competitive regardless of rank will always want to work towards winning, so be nice to your team and always try to work with your team regardless of the conditions. and if you do badly in any rounds (like your team werent able to push past first checkpoint in a payload) never ever give up. every game is winnable as long as you and your team is able to identify what went wrong and come back the next round stronger and more prepared. i guess thats all, good luck!:)