What do you get when you put shit into a reverb? Reverbed shit.
Do not try to fix or mask bad quality sounds or recordings with effects processing. Instead, just don’t use bad quality sounds or recordings at all (unless it serves a creative purpose).
If you want your music to shine, all of it’s components have to possess good qualities from the get go.
Then, instead of fixing one problem after another, you can focus on using effects processing to make something out of those good qualities, bringing out what you need and making everything work together as a whole.