Which one of the following prepositions in my self-made sentences sounds more natural to you: Group 1
- 1 - He is really a bad-tempered man. He got used to finding fault with everything.
- 2 - He is really a bad-tempered man. He got used to finding fault in everything.
Group 2
- 1 - Why are you finding fault with everybody this much / so much.
- 2 - Why are you finding fault in everybody this much / so much.
For me, both sentences work properly in both groups.