Hehe I know exactly that feeling! Honestly I found the same with Skyrim, GTA5 and Witcher 3 - I can't imagine spending 100+ hours on a game like that, knowing I'll probably not finish it! I know it's irrational but I'm the same. :)
I loved Disco Elysium and Life is Strange 1 because I truly did feel that I left no stone unturned in my playthroughs - it felt very "complete" and had such a satisfying ending that didn't leave me wandering around a progressively more empty hand world.
I guess that's a type of game preference - I love watching other people play big games like that, but can't do it to myself as I feel it's never "done." :)
And yet... I'll play a wrestling game for probably hundreds of hours, knowing fully beyond unlocking everything, there's a game I can't "finish" - weird really! :)