What to do with bad recorded CDs

OP-

Kick back, listen and enjoy the music!

Crappy-sounding recordings or crappy-sounding pressings are a fact of life in this hobby. As others have suggested, there are various tweaks that can be applied to a problem CD to make it potentially more enjoyable, and I agree that seeking out better pressings is worth the effort, but I think the ultimate solution is, as Jafant suggested, to kick back and TRY to focus on the joys of the musical content, not the quality (or lack thereof) of the sound. Easier said than done, I know, but IMO a truly great system can capture the inherent good qualities of a poor recording just as much as it can reveal its flaws, allowing one to more easily focus on the musical content. Just one man's opinion!

I toss all bad recordings.  Why store crap that I will never listen to!

Easy solution... buy speakers and equipment that are non-fatiguing and that allow you to enjoy every recording in your collection. Sadly, some of the most highly touted brands out there do a poor job at this. Avoid those brands and/or models within those brands, and you'll live a happier, more musically satisfying life. 

There is much good music recorded less than optimally. Sometimes poorly. If you love the music recording quality will not stop you from listening as long as things are going well. If not there are ways to make lesser recordings tolerable perhaps though always remember recordings are what they are each a unique sounding work of art with unique things to offer.   Much great music may never live up to audiophile standards but that will not stop a music lover from listening.