It's important to remember that there are many different types of people, styles of teaching and that we won't agree with all of them.
Not everyone will love you, and that's completely OK.
Just because someone disagrees with you doesn't mean you're wrong.
Take your time. There's no rush to be good or renowned.
The self doubt can be a fantastic opportunity to self-reflect and see where you can grow and be stronger.
There's always two sides to the coin if you have the patience to see.