Well yeah, the stick is on a loser there. The right one anyway, not the left
That's why the comparison is and always will be off. I'm a hardcore MF, I used to (and still to this day!) play Goldeneye and PD with aim assist off out of principle
But it's never going to stack up to a mouse, of course not. That's where the ceiling comes in, because a mediocre mouse player will always beat a good stick player, which is why it seems easier. But lets face facts, aim assist is a thing and that narrows the gap on consoles significantly. However on PC there's no such crutch, so the work you have to put in to match up becomes way higher. If that makes sense.
But I'd never play a souls game on MKB, that's just stupid. Basically, long story short, the right tool for the right job