I think we all have that one specific moment with this game that just broke us! Regardless of whether you came back or not, I obviously did. Mine happened after I finally unlocked General Anakin...
July 2021 nerfs. I actually told my GL to start looking for a replacement. Obviously, I didn't walk away.
Datacron release. I took a full month of GAC off. Decided I'd only come back if I missed things. I joined my guild stream crew for the last week of that GAC season and decided they were fun enough for me to come back despite my hatred of DCs.