Honestly i don't think your bans are unjustified, here's why-
I've found myself tilted before, and have been known to be fairly toxic. granted i'm trying to reform and be less toxic, so i mostly just mute all instead of argue in chat. anyway, i've said some really toxic stuff in chat before and been reported a few times, but have still yet to be chat banned, or not been able to play. most of the post you all make, showing your "chat log", i honestly think you crop and edit, and take out all the truly toxic things you say, then when you post it, it looks like you were innocent and wrongly accused, etc. if i'm wrong, i'm wrong, but considering the things i've gotted away with saying in game, i can only imagine what it takes to get banned...