I think completely quitting Heroes wouldn't be a good idea. It's better to reduce the playtime to 1 game per week. This will allow you to participate, albeit with some difficulty, in 2 tournaments simultaneously. With mandatory breaks in winter and summer, you'll get 5-6 tournaments per year. You just need to decide which competitions are important to you.
Regarding the quality of your gameplay, I can suggest doing a stream with commentary; it has a very positive effect on your skill. I would have done it a long time ago, but my laptop can't handle it.
Your gold is amazing :)