I have replayed Gothic 3 many times. It's perhaps Piranha Bytes' most flawed game, but it is also the most ambitious and interesting. I thought the writing was pretty awful, and the game had performance issues like nothing else I've played. I see some people complaining about Elex 2 dropping to 30 FPS here and there as if it makes the game unplayable...Gothic 3 would often drop to well below 1 FPS when I pulled out a torch or another light source.
And still, I did love it, and still do. The game world, with all its unique and interesting settlements and locations, is a joy to explore, and beautiful to look at. Character development is excellent, and I love how you are frequently rewarded with small stat boosts for doing relevant things. Melee combat, as has been pointed out, is pretty darn poor, but magic is okay, and archery is actually very good.
I have no problems understanding why some may not like Gothic 3, but for me, its qualities outweighed its flaws. And that's saying something, because there were some serious flaws.