One thing that actually makes me toxic.
People not listening to pings in diamond. Communication is the SINGLE most important thing in this game. You don't just afk farm top if you want to win. If you want to just kill creeps non stop and watch your nexus explode helplessly just play a custom game ffs.
Oh the enemy jungler and top lane are sitting in a bush at red? Oh you're playing malphite top you have full mana and health and ult available? Nono, don't listen to your jungler, just let them take my entire fucking topside when you could just fucking press r on them. jesus.
When i see actually boosted animals on my team i want to rip my eyeballs out, and it makes me fucking toxic. Things are only made worse by dynamic boost.