PC - iTunes taking 5 minutes to open

So I bought a new pc recently and decided to do the horrific thing of transferring my iTunes library from one pc to another (every time I've done this in my life has been a nightmare and this has been no exception). I then had this crazy idea of syncing my iphone to the new pc and so i did. After doing this I turned off my pc and went to work the next day, came home and ever since then, my iTunes takes 5 minutes to fully open.

I Am currently using the microsoft store itunes app and i wish i didnt at this point as im reading horrific things about accessibility and bugs with windows. I have tried running as administrator, i have tried safe mode and basically every method that does NOT involve uninstalling or reinstalling iTunes, as, i have developed PC iTunes PTSD after losing hundreds of gigs of music over the years (and most recently as this past month) from uninstalling itunes and transferring libraries.

Please help me find a simple solution that doesn't involve me losing any more of my music