TLDR: If you like PF 1e then you'll probably like this game. I think most of the lower ratings are from when the game first came out. I didn't play it until years later when most of the bugs were fixed. It really is better than 3.4 The game has significant improvements over Kingmaker, and I really enjoyed it. I still think Owlcat went to far with requiring buffs so much. I was hoping they'd have the stats more in line with the tabletop version, but they stuck with the baseline they were using before. I do like the number of archetypes and other build options. I didn't have to install a mod to play a class I wanted. With the mythic paths you could play the game several times, and there are multiple endings. They story is also nice. One of the my favorite party members mechanically had a terrible personality. I want to say more but I want to avoid spoilers. I'd give it a 4.3 to 4.5 if I could do partial stars.
The main story is really good, and most of the NPC's quest are really good. There is a spike in difficulty that I don't care for. I also think it can be difficult if you're not already familiar with the Pathfinder tabletop rules, however the game does allow you to control the difficulty so you can always scale it down to something more managable. There are also numerous ways to play through the game, giving you a different experience each time. The crusade mechanics are something I don't care for, but I felt the same way about Kingmaker's kingdom building mechanic. That being said if you want the best experience not using autocrusade mode is the wayt to go.
