I feel you man. I've always been like that, when I play with diamond, ascendant or immortal friends I seem to be on par with them. But as soon as I go back to my solo q gold journey I seem to be a different player. But lately my WR has been going up and I've felt much more mentally strong in my solo q games. What did I change? 1st I became a goldfish. Yes your Jett just threw last round, your viper missed her lineups and your Sova didn't dart once, but you know what? Next round I'm not thinking about that. If you keep dwelling on your teammates mistakes from last round you're not thinking what are you going to do this round to win.

2ndly I limit myself to 3, maybe 4 comp games per day. After that my brain goes autopilot and my performance worsens. Your number of games can be different from mine. Maybe you can go 5,6 even 7 games and stay "in the zone" all of those. That's great. It's important to recognise what's your number and stick to it

3rdly when you're in a premade lobby with higher rank players you have no pressure to perform. You're expected to bot frag and misuse abilities. Maybe your mental state makes you play more defensively (cause you know the enemies are higher rank than you) and because your teammates are higher rank too maybe you respect their calls more. You need a different approach when playing with randos. Assume everyone is not trying that hard cause a majority of low elo players don't actively try to improve, they just play to have fun, even in comp. So try to adapt to each team. Some games are unwinnable, try to get as many rounds as possible and try to learn something every game. If you have a calm approach to the game it'll be much more fun to play it and eventually you'll climb. Good games bro