Get beaten badly by a team.

Play again.

New team is you plus members of team that recently easily beat you.

Now they are not good.

Ranked usually uses metals and gemstones to identify the skill level of the player. Bronze, silver, gold, usually diamond, etc.

So basically he "got slapped" meaning totally hot his ass beaten in the game by these high level players, but when they ended up in his team on the next round they played like total noobs.