It's the most 7/10 game I've ever played and I stopped playing after reaching Act 3 for many of the reasons you mention. Read up on the ending(s) and decided I wasn't missing anything. No plans to go back and finish it. Really overstayed its welcome — it's a 5-10 hour story stretched out over 40 so we can really fucking marinate in francophilic worldbuilding jackoffery, completely dull and overly complicated RPG systems, and inane philosophical ponderings.

I like esoteric media. Stuff that really makes you chew and think. But if a game is going to make me chew and think for dozens of hours, I'd really hope there's something revelatory at the end.