I fixed a hole in wall and did everything. My problem is you can see the entire outline of the work. I know would normallly mean that I have to sand better but I couldn't sane anymore because the tape started to show... I used the mesh tape with the holes in it. Did I do something wrong is there a way I can fix this?

Put another coat of mud on the repair and feather it out farther.

To do a good job with a butted fit, you need to feather the drywall mud out at least 6-8 inches from the joint. Put more mud on the wall but extend it out more. Are you sure the patch is flush?