This is why I suggested you take a break from posting. Changing your username, avatar, and deleting all of your earlier posts will not change anything if you continue with the same posting style. Especially when you yourself want to let others know that it's you, under another name.
If you really want to continue posting, go back and look at some of your posts that got negative reactions. Try to look at them from another point of view. Do they interrupt the flow of the conversation? Do they seem to be obsessing about the same subject? Would other people really be interested in what you're posting? Does the post even make sense? Do I come across as attention seeking?
Then, keep asking yourself these questions before you hit the reply button. Not everything you're thinking has to be shared with the world. People are not haters because they wish you would stop doing what you're doing.
But if you can't do this, or at least make an honest attempt (which you have been able to do from time to time) then discussion forums are not for you. Enough people have told you this in a caring way. Please listen.