This thread makes me think of Carol Dweck's fixed vs. growth mindset. Fixed mindset says people are good or bad and they stay that way. Growth mindset says you may be bad now but you can still get better.

A bad player can have a fixed mindset and not try to improve or a growth mindset and always try to do better.

A good player can have a fixed mindset, sit on their past accomplishments, and not try to improve or they can have a growth mindset and look for opportunities to get better.

In both cases, it's really the player who refuses to learn new things who is "bad," but it's not like that is life or death because this is a game, after all.

The people who hurl insults probably have a fixed mindset because they tend to say things like "You are bad" not things like "You are performing badly." So, don't worry about them; they won't get better because they already believe they're the best. Meanwhile, if you look for the takeaway in experiences, you will continue to grow and tomorrow you will be better than the ones who insult you today.