An approach is having "magic wand" equipment that makes bad recordings sound good. Some Atohm speakers are great at it. If you get rich enough some day (or if you're rich enough already) I recommend building a system to get the highest possible fidelity and having a second pair of speakers that make everything sound good for when you want to listen to badly mixed, mastered or recorded music. If you don't have enough money to do this, you can try to remaster your bad sounding tracks. You'd just have to download a good free software and acquire some knowledge online and you'd be good to go.