I hear ya! [emoji4] At least now, if I automatically acquire the MP3 tags, I compare them to the list on the CD's insert. Can't do much about the ones that are wrong when you download an album, though. And sometimes I don't even listen to the whole album, so I may never know if there's a mislabeled song unless someone requests it. I listen to every song I put on a playlist, so at least I know those I plan to play are correct.
I'm anal about the spelling as well, and I often had to fix it .. so it was just easier for me to key it all myself. Every word in a song title starts with a capital letter - CDDB still gets this wrong, as does iTunes, Amazon and others. Example: Mary Had a Little Lamb .. that little 'a' has to be fixed.