Elden Ring bosses are mostly a bunch of non-stop flailing assholes. After 3 Souls games, Sekiro, BB and Demons Souls I suppose there just isn't that much room left to create interesting encounters using what is essentially the same combat system since Demons Souls, with some tweaks of course.
If things keep progressing the same way, I expect Elden Ring 2 will have some bosses where if you're a pure melee you'll do nothing but dodge for a full minute before getting a 1 second window to punish, then another full minute of dodging, etc. What else can they do for melee with the current system? They added ashes to every boss fight so they really had no choice but to make them unbelievably aggressive with long combos otherwise you'd just trade hits for easy wins.
Personally I hope they do away with the ashes system, if indeed I'm right in that they force bosses to be crazy aggressive to the point where most are trivial as magic users and difficult for everyone else.