I can’t delete the iOS 14 beta.

I recently got the iOS 14 beta, which by the way is looking good, but I had one major problem which was that sometimes my touchscreen would stop working. The way I could fix this was using the Erase tool on find my iPhone, but now that I have signed back into my phone I can’t get rid of the iOS 14 beta. I have tried removing it from the profiles and that didn’t work I tried getting the iOS 13 beta and then re updating from there and I have tried using an old iCloud backup but none of them work. Please help me as my touchscreen is stopping working at least once a day now