Am I the only one experiencing problems with parts from here?

I'm not dissing on anyone or anything. I am trying to figure this out because I know I can have bad luck in everyday life, but really never in parts or repair. As of late, it seems like I'm having issues with iFixit parts. The main problem is an iPhone 7 that I am having problems with. Originally I put a new screen on it in December I believe. It was fine until about 2 weeks ago where the owner reported the left side of the screen stopped working to the point that it went black with a line being the only thing visible. There is no damage that can be seen or anything. It had a tempered glass and if there was damage caused by the owner, I would think it would of shown on that too. No problem. I order a aftermarket screen assembly, do a warranty claim on the old screen and install the new one I installed. The newer screen looked fine and worked will. However that didn't last long. Before putting it back together, I let it sit for 5 minutes or so. That is when it started to show a flickering white ring around the edge of the screen. It went away after using the phone for a bit but soon enough it would come back. Well maybe it was defective. So I did a warranty claim on both screens. I got the new ones. This is where I am wondering what is going on. I tried the first of the newer screens. All seemed well. I let it sit for like 30 seconds and that is when a white rectangular section on the middle of the screen starts appearing. The more it sit, it comes up fully. There is no way I thought. I then try to use the second of the the two that I was sent. Same story though but different result. Everything was fine. Let it sit and now it shows the middle rectangular section with spilt regulars going up and down and the flickering white ring around the edges from before. In all of these attempts I disconnected, clean off the connectors in how iFixit recommended me before, then reconnected and put the bracket to be sure they weren't going lose or anything. But the results would be the same. I haven't denied it couldn't be the phone. But I asked a friend to let me use their iPhone 7 to try their screen. It is the original Apple screen and even after letting it sit for awhile, it all worked fine. So that is kinda telling me that it's not the phone and more then likely the screens. I know they aren't the choice version but I wouldn't expect that from here even for cheaper versions. Should I go ahead and try the choice version and see what happens or is someone else having problems and I'm just lost in what to do?