judgmental and needing aproval leads social anxiety

I am having many difficulties like people skills, social anxiety, judgmental abt ownself, overthinking, what others will say or judge. But actually I only judge myself.
I don't hv sharp memory, speed and quick understanding of things. Can't take care of others. Always have fears. Always look situation as competition.

Will I get better?

How old are you? If you have those problems as a teenager they often get better. If problems like that persist into adulthood then they are often harder to conquer.

A significant factor is how your daily living is impacted by the concerns you describe. Seeking professional medical advice and a therapist can help you.