Alex, I absolutely agree that you can simply leave an argument online if you don't find them tolerable.
If you start a fight and can't handle the problem yourself like a grown adult, then leave! You lost on the internet, who cares.
BUT at the same time, the point of having a long standing and healthy community like Aries is having a safe space like the forums to call out on people if they're actually being bellends.
If there's this person just spewing toxicity all over the Aries forums and discord, it would be at everyone's benefit if someone like Nova got to banning them as quickly as possible.