What don't you like about the combat?
The only thing I like about it, is that it promotes preparation with the bestiary and such, but in reality that only really speeds up the process with pure numbers most the time.
People compare it Souls games for some reason, which I find completely well, wrong / not even close to be truthful. I can see people trying to argue that combat makes you commit to actions but here's the thing, when you attack it's animation fluff, there's no set movelist so you get a randomized attack sliding you towards your enemy that you're committed to, being locked into something like that where you don't have a truely invincible dodge (perks help) and hitboxes (especially on boss type) are just as bad as the worst souls hit boxes aren't great. (And the bosses really were a disappointment to me IMO, they really show how mechanically linear the combat is, and while being how a correct build can make it even more so.)
The only real utility stuff I find in combat is actually the bomb stuff that sometimes do interesting things.
I mean the combat isn't offensive to the point to hate it, but it's just a constant fluff time waster to me personally, no open world game even tries as much as Witcher 3 in this regard but really I'd rather cut to the chase in Skyrim (I play thief/assassins always) as their Stealth mechanics are actually decent and instagib dudes with min maxed backstabbing.