I have an objective way of critiquing songs.  For me, a good song is like a tripod. It has (at least) three solid supports. Lyrics, melody and structure. If quality lyrics aren't there, then it's not a good song.  If solid structure is ignored or veered away from, it better be for an impressive reason. If the melody isn't good, regardless of lyric quality or production value, the song will sound boring and won't hold anyone's attention.