Help me stop being mad pls

I started playing this game 5 years ago. At first it was just to play with my boyfriend but I soon got really into it. I have never had a real hobby before, the only other thing I am so passionate about is work and there I can be super cool and focused, but somehow in league I lose my nerves. In 2023 I hit diamond 3 then after playing on a new setup and going back and forth a few times I ended up with a low emerald. since then I can't climb. I feel like my attitude is holding me back. I have tried taking breaks, playing in intervals, muting all etc nothing works. what can I do to stop being so fking mad about this game?