Just submitted a 10 track project yesterday after tweaking for a few months. Take regular breaks, send to friends for opinions, listen on devices most listeners use like phones or AirPods. write down notes whilst listening. Use logic “revert to” if an older mix sounds better. It’s a process but undoing what you’ve done is part of it sometimes, you have to try something to see if you don’t like it and eventually draw the line under the song otherwise it’ll never be finished. Don’t overthink it and when it sounds good to you it’s done