Replying to Final cut express exporting

so, first of all, I know final cut express sucks balls and that i should be using pro, but for now i just need a question answered: when i export edits out of FC express, i use "export as quicktime conversion" and usually use .mp4 or .mov files. but EVERYTIME i do this, it exports either in super bad quality or has small glitches in the titles, transitions, etc. Am i doing this wrong? is there a better way to export so i have a cleaner finished product? help!