Sucking

If a band is on the radio, that generally means it doesn't suck. If a song comes on, and you really don't like it, or the band that plays it, say as much. Say, "I hate this song," or "I really can't stand these guys." But saying "These guys suck" doesn't work. Because they don't. That's why they have a record deal, and get radio play. You might not like them, and that'd fine. But they don't suck.