Can someone explain what makes the highlighted team so strong?

I got taken out by the rank 2 guy (who actually became rank 1 when I left) in a post dragon round. What makes this team stronger than the other 3 teams, other than the fact he has 3 3 star units, who are all tier 1? He has no strong synergies, only 1 tier 4 unit (who is 1 star), and only has 7 units. Am I missing something, or are his 3 star tier one units really outweighing our multiple 2 star tier 4, 5, and 7 units with completed synergies and 8 units? If that's it, it seems really unreasonable.
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