Specifically "Single Use" feats.

Protected
Nova Blast
Fastball Special

If my opponent uses these, I gain the points. Correct?

Now I have anywhere between 8 & 32 points. No figure is KO'd by the end of the game.

Who wins?

Me or my opponent?

Correct.

If no figures were KOed, the winner is the player with the lower build total. It makes no difference how many points you took from feats.

Sadly I lost the second round today due to that ruling.

And for Protected to boot. :disappoin