My MMR went from 5k to 5.8k but my behaviour score tanked in return

Not sure how this system works. I have never, ever in my life griefed a game of Dota, and I have been playing for 15+ years. It is something I am very against, but apparently it is enough for someone to just dislike my pick and fuck me over for it.

I have been winning. Hard. Like climbing up for the past few months, playing on and off, but I play a lot of unconventional heroes in unconventional roles.

My most played hero is Pudge. I play him in all roles, but people absolutely hate on the hero and yet I have 62% winrate in the past year. Doesnt stop people from threatening to report me for picking him in any role, doesnt stop them from griefing with their own picks because I picked Pudge either.

I like to play support Sniper. I get that it doesnt work for many but it works for me. Zeus, Tide, LS,.. many other heroes that dont work for others just work for me.

Yet despite winning most of my games lately, I just keep dropping in behaviour score, and now I dropped to a new low: 4k. I get banned for a day, get 4 SD games to win, play for a bit, get banned again and repeat. I won my last 3 games, but I got just a ban until Thursday for some reason.

I dont care what others feel like I should play; reporting someone before you see their gameplay shouldn't be a thing in Dota, where many things can work. People get banned in League for playing weird heroes in weird roles, but I guess it is now a thing in Dota too.