God bless friend. You are important and valuable. Know that inside, so strongly that it will not matter what anyone says about you.
Think of the experience here like grocery store shopping - there are thousands of items in the store, but you only need some of them. Do you walk through every aisle and shake your fist about all the weird, offensive, or unhealthy items you would never want, or do you just keep your eyes out for the things you need and ignore the rest?
Also remember that anyone can post here, including people that hate us. Some (or many) of the posts on here are made by people getting paid to irritate you and make you want to leave, and make you have negative feelings about anons and a board outside of their system of control.
True, a few anons will give you a hard time for being new and saying things they think are dumb, but I hope you are strong enough mentally that it doesn't prevent you from doing what you came here to do, which is learning and contributing and encouraging others, right?
Just ask if you don't yet know how to filter a poster, hide an image, or anything else that what help (other than trying to change everyone on here and what they say, which is impossible).