sounds like you need a phono stage between the turntable and your amp, something like this: assuming you don't want to spend a lot. make sure your turntable arm is properly set up too if it's adjustable, those chap usb decks are notorious for wrecking precious vinyl at the cheaper end of the market.
https://www.richersounds.com/btech-m...c-pre-amp.html
if you start to pick up the vinyl itch again, get something like this - decent deck for not a lot of cash. It's a slippery slope though- worse than watches!
https://www.richersounds.com/project-elemental-red.html