iPhone 6s part and accessories help

Hello!
I have recently bought a refurbished iPhone 6s pretty cheap on Ebay (since my SE broke) and issues were to be expected. Screen is scratched and there’s one dot in the screen that doesn’t go away no matter how much I pick at it, and it triggers my non-existent OCD.
Anyways, I bought a bunch of accessories and items I thought was necessary such as a phone case, screen protector, new screen to replace scratched one, and a new battery to replace the old battery which lost 11% efficiency (also came with more MaH then original). Anyways, when shipped everything seemed great. So, I opened up my phone and replaced the battery first, after I was done, everything was perfectly fine. Then, I replaced my screen and to my disappointment the screen was extremely low quality. It seemed kinda blurry / unclear, margins in the back, and the screen had no slide/slip (too much friction when sliding finger across screen, it’s really noticeable when it’s bad). Anyways, I double checked the wiring and all that, and even reinstalled it, no luck. I put my old screen back and everything was normal so it had to be the screen. Anyways, I was a bit bummed about the screen, and refunds were a no-no because the seller requires you to pay for shipping to send it back for the refund (shipping is close to the price of the actual item). Anyways, I can live with a scratched screen so I just forgot about it. Installed my screen protector (extremely nice installation, had a frame and everything) and it was awesome, until it cracked randomly when I set my phone down.
If anyone bought a screen protector and or screen replacement for the iPhone 6s (or another phone) and has had it for some time without issues and it’s decent quality for a decent price, please do comment a link or brand for me! Posting this to see what worked for other people, because it’ll work for me.
Thank you!
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