they've gotten so P2W that I actually left (and this is after making a few event guides)... so has anyone else done the same and quit this game?

I haven't paid a dime and the only time I don't rank is when I skip 75% of an event. I have been playing long enough that I cleared out all the normal gachas, though.

i've played for a long time too, but the issue I had was that my first account got hacked, the asshole that hacked it got it banned due to stolen credit cards, and nutaku pretty much said "we're sorry, but go make another account". so I lost my progress and I had over 1.2 mil SED (and a lot of progress in Osawari, Kanpani Girls, and Angelic Saga at the time). I'd possibly have 1.4mil-1.7mil SED if it wasn't for that, cause it took me a few months to come back with the account i use now

I actually got fed up with the game (after clawing back to 400k SED) cause a few events did get a bit paywalled (like needing a ton of faction points to get access to the faction card, which you need a TON of puddings or a booster to even get that far)

I left about 6 months ago. After putting in around give or take 12-16 hours a day of attention, I was left with either cutting out sleep entirely or heavy botting. Rather not do either. I think I was at 3-4M SED... I honestly don't remember, nor do I plan to find out. It was okay while it lasted... honestly only stayed for that Discord chat. Great People in that chat.