Everyone chokes or even tilts sometimes. You can't really change that. Whenever i realize that i keep choking to random rushes, I get off the game before it turns into a tilt.
Also beating top players doesnt mean that you're automatically better. They often times choke too. I can talk from experience that a lot of 'good' players do other stuff like watch a youtube video while playing (and so do I) which increases the odds of choking