It's called buyer's remorse. Maybe take your time before making a decision to make a purchase?Something is wrong with me. After buying something I have immediate regret buying it and in my head I start to think about returning it. I start naming off all the ways about the thing I don't like and how it was a bad purchase.
I start to reason within myself why its a good thing you are returning it because you don't really like this or that about it or hell just the thing in general.
Sometimes its completely logical but most of the time its just me picking this thing apart bit by bit. Finding one thing and sticking to it until I convince myself that I need to get rid of it or return it.
Im not sure what all of that is called but I do it with 98% of the things I buy.