Banned again for defending myself on chat

Everyone gets bad games, I get it. However, recently I noticed that the system automatically bans people off for simply getting reported without proper game evaluation, and is 100% based off chat. I've been dealing with anger issues for awhile, but always try to keep it low unless something's going horribly wrong in game. In my experience, whoever is getting a bad game is kind of scapegoated into getting judged as mob mentality rule and most of the time its because the player simply can't catch up to his teammates/get the proper tanking so he can stay relevant into the game/generally getting trolled in allchat. The worst part is that in this patch, the mute button is literally missing & getting my chat flooded with negative comments about how I'm playing really isn't helping me from not being toxic.

Last game to experience this was playing as Malzahar mid vs Yasuo. At first the whole team was doing fine and synergizing, but then out of nowhere I kept getting ganked from dead angles & requested help on chat. My team apologizes, but never really got around to sticking close to me to buffer some of the damage and harrass I was getting. Whatmore, everyone always found that it was easier to blame me for not being aware about the map when I ping for enemy location almost every play & keep a moderate distance [despite Yasuo straight up being able to get in face in 2 E presses.] Its frustrating enough that the system keeps sending me anti-team players that hardly give a care to the weak link & effectively got myself pushed into my tower without much help.

At 32 minutes, I got 1 kill. It was when the whole team finally agreed to go mid, but this was shortlived as they all had mobility abilities keeping them 6 units in front of me, chasing a stray champion while the enemy team converged into the jungle to 3v1 me for 6 deaths. How can someone not lose their cool after all this? I kept trying to mute, tried not to be too inflammatory, but a man breaks to pressure every now and then. The worst part is having to be a sport about being severely shoved into a support role & knowing the game simply won't work if the team doesn't stick together.

I'm having the worst time on League and I hope I can get the help I need once the ban lifts. I've been playing for 3-4 years & its really starting to eat me inside every game. My win rate is stuck to 50%, I can't move anymore forward since every day is a challenge not to be mistreated for being misunderstood.