Am I doing something wrong in combat?

Hi guys

I used to struggle nearly every single boss fight during my first playthrough - I thoroughly studied the moveset, learned all the safe frames to heal, tried to play “smart” and be extremely patient and control what I do and how I play. Took about 80 hours and I only managed to finish P1 on every binding. Now two years later I decided to play again.

Now I just mindlessly slap everything with Long Nail + Quick Slash to death, and nearly every boss is done before it’s even a threat. I finished P1 and P2 in 2-3 hours (every binding) and didn’t learn ANYTHING (except grimm). Is it supposed to be so?

Video to illustrate my point (2nd try, have no clue of his moveset)