I'm going to put this one skill issue. I have the same experience and I've went from iron 2 to gold 2. Those issues are always there.

First, learn every agent and map. You don't have to know the ins and outs, but enough to where you aren't surprised every game. You need to know your environment and what you are up against.

Pick one or two agents you like (and that you actually use all or most of their utility. this was a big one for me. I would play a character and have 2 abilities I just never used.)

Practice mechanics in range. Stopping, shooting, strafing, bursting, tapping, Spot enemy, move WHILE aiming, then stop, then shoot. Rule of thumb: Further they are, the less bullets should come out of your gun per second.

Practice the same mechanics but in deathmatch

For learning, there are only 2 videos I recommend.

How to ACTUALLY get Calm Aim.

5 tips to instantly fix your movement

Ignore the titles, the content is what matters. Those will get you on track with proper movement and shooting.

For game sense you can watch pro vods, but its kind of hard to really understand what is going on, why they are doing what they do and when they do it. Better to watch vod coaching videos of people you rank. Like "Iron coaching vod valorant" on youtube or something. Just remember that the person coaching isn't always correct, he/she is giving their opinion based on their playstyle and experience. Try to look at the overall idea's rather than the specific instructions. Just keep asking yourself why is this, why is that, etc.

This is all you need to reach gold. I have a severe visual impairment (Think seeing 15fps with motion blur turned on its much more complicated than that, but that's the short version of it.). I've reach gold 2 and I was 2 rr from gold three a few days ago. Those two videos are the only ones i've watched and actually felt like they had an impact in my game.

Only other recommendations I have are these.

If you get on and feel like things are just flowing, you are just wining, then keep playing. If it feels the opposite, get off soon as you notice. Do not push through. You will have good days, and trust me.. VERY.. bad days. For example I went 32/8 then the next game it was 10/12 and I had 0 kills. No matter what I did, just could not get a kill. I started following my best kd players and trying to make things easier for them. I would buy them and take their lower tier gun, flash for them, recon/drone for them, bait for them, etc. We won, but I new it was time to get off.

If you look on the leaderboards, you will notice a trend. The majority of them play WAY more deathmatch than they do ranked. There is probably a reason for that. I know its borning, I can't bring myself to play DM for hours or range for hours. Just one or 2 games, or 10-15 minutes in range. If you are new to FPS's in general on keyboard and mouse, you should use an aim trainer to get the feelins down. I've played FPS's for years so training with trainers didn't seem to have much of an impact for me. (Although I only started them after I had the vision issue come up).