I used to play every souls like, I started with dark souls in my teens and played every single one, even went back for demon souls. My favorites (and the only from soft I still play) are bloodborne and Sekiro.
I got to Elden Ring and I was honestly already burnt out on the style. I managed to force myself through 99% of the game, got probably 90% of the way through the final boss's health bar (terrible boss IMO) after a couple fights and my desire to play souls games just..died. I don't think I ever went back and beat it.
Seems like eventually the "excitement" on beating bosses just....went away for me in souls games. It is still there for games more actiony, where it feels like there is more to learn on the player side than the boss side. Nioh has never gotten old to me, because the weapons are complex and the game is begging you to break it. Games like DMC5 and Ninja Gaiden 4 (which I beat last night, so much fun) have so much more for the player to learn of their own skillset than a souls game and they remain infinitely more interesting to me.