Most likely, your computer was still accessing it, which can happen with any program you run, not just my game. If you go to task manager, you can force close it, and that'll let you delete it
In the end I brute forced the uninstall through different adminstratory shenanigans. Of course I made sure to have it closed in the task manager beforehand though and it still denied me from uninstalling, saying I would lack administratory permission (which is impossible as I'm the only one in possesion of my pc). Thank you though, I appreciate you trying to help me ^^