Twice, actually. First time was the Ringed City DLC for DS3. I was already kind of burnt out after the first DLC, Sister Friede was really challenging for me and I hated how long phase 1 and 2 was, only to get one shot instantly at the start of phase three. Took me a really long time to beat her. Then in the Ringed City for some reason I struggled with the Demon Prince even more. And it had all the same things I hated: a gank fight (I struggle with tracking multiple objects so any gank fight feels almost impossible) and a super long phase 1 that just feels boring and like it deliberately wastes your time. And I don't know. Eventually I just realised I wasn't having any fun. Didn't keep going past Demon Prince, and then Elden Ring came out and I just never went back to the DS3 DLC after, and after ER I kinda moved on to other things.
And then recently it was GRIME. I was already kind of feeling Soulslike fatigue I think, and I think the game was just a bit more difficult than I was expecting. Got to the first major boss and it was a 2v1 gank fight. Eventually got through it - only to find out it had a second healthbar and then get instantly one-shot. And I just kinda realised maybe I just need a break from feeling like I suck at everything for a while. Or maybe I've finally gotten too old for Soulslikes and really difficult games. I didn't really feel that fire or that need to overcome the challenge that I used to feel that would lead me to spend days working on a boss until I beat it. I just felt tired.