New chain and sprockets. The front sprocket nut should be 115Nm. I span it off with one finger. Horrific. plus the rear sprocket had a nut so seriously cross threaded I had to source a replacement sprocket carrier. Let’s not forget the finger tight rear caliper bolt.
Stuff like that is the reason I go through every bike I buy and don’t let anyone else work on them. It’s frightening the things you find.