This is the only advice you'll be getting from me, so listen up. I get that it may seem like everybody else is ganging up on you or something like that, but they have a point. You've been given tons of advice by tons of people, and it doesn't seem like you followed it all that great. I'm not optimistic about my own chances, but here's what I wrote up:
1. Don't snap at others or start arguments. Mona's a bit of a prick, but that's no reason to not be respectful anyways. You only feed his bottomless appetite for shitposting and thus fail to help yourself at all.
1.5. If you don't like what others say and don't intend to answer seriously, just don't reply. Same thing with trolls.
2. Don't RP with yourself. If you want to do that, just go write a story. Additionally, you should probably restrict yourself to very few alts, or even better, just a single character that you can actually develop, instead of just using a giant, forgettable cast of characters.
2.5. No matter what you think, no, you cannot manage that many characters. At least not to the standards we set here. It may be different elsewhere, but on the Phansite, you'll only catch more shit.
2.75. It's not the alt accounts that are the issue, it's the alt characters. It's better that they are each in different accounts, true, but that does not alleviate the original issue that they're not great characters in and of themselves until you focus on them and build up their quality.
3. Spend some time looking at people RPing and take notes on how they structure their posts. Neater and better written posts make others take you more seriously.
3.5. Proofread before you post anything and ask yourself "Will this lead to others making fun of me?" If the answer is yes, change the post.
4. Your threads are mediocre at best. Restrict yourself to RP in other's threads, and once again, take notes and learn from that, before even thinking about starting your own threads again.
5. Pay attention when others give you advice instead of immediately jumping to defend yourself. If it was only one person constantly going after you, this situation would be different, but given the fact that the majority of the site is telling you to do stuff differently, it's obvious that something they're saying is accurate.