Dash Cam suggestions

Please don't say Nextbase, absolutely waste of space, I bought the 622GW top bundle deal on the 2022-09-23, it worked for a max of 10 days, and finally got it removed and refunded in April this year, after having it for over 6 months, it didn't cover for longer than I stated, it was just useless, and the BS 2 of the fitters gave were crazy, and the more qualified guy who removed it said that they were wrong in what they did and said, it was just useless and failed to cover the car which was why I bought it.

So, I am looking for a rear-view mirror camera, so much easier to see and use, and don't think it will be on when driving, something Nextbase couldn't accept what I was saying about wanting to use it as a rear cam option as my windows are very dark, not to forget the screen size making it easier to see, so any thoughts about a 4k camera set?