General rule of advice: Don't automatically assume you're right and everyone else is wrong, especially when you don't have that much experience. If you're not able to accept that, you will not be able to improve, not as an artist, not as an animator, and not as a person.
That being said, there will still be a few people who would say shit just to be assholes, but being able to differentiate them with proper criticism is itself a skill you can't always 100%, but can still be accurate with practice. The same is true with art, animation, or other forms of content creation. If you don't want to fail in these regards, ideally you need to be able to accept, and later overcome any possible shortcomings, flaws, and biases.
I'm hoping this review would put you on the right path. A path that's hopefully not fueled by negativity. The internet is not the safe space you expected it to be, and Newgrounds is especially not that type of place. If this still gets me 'banned', so be it. It's not against NG's rules to give criticism.