Hilde was broken because she had a combo that was a 100% guaranteed ring out that could be performed from just about anywhere.
http://www.youtube.com/watch?v=_xQRS...eature=related
Aside from from the very rare cases where the term actually applies (like the above) though, I tend to hate when people say "bullshit victory" (or "cheap" or "spamming"). Those tend to be uttered by bad players who can't overcome simple tactics and refuse to admit they aren't the best, who just decided the other player isn't winning the "right" way to convince themselves they are still the best. I'm sure it's more just a friendly rivalry in the case you mentioned but I'm just saying in general.
I don't think I'd call Gauntlet Legends similar to a fighting game lol. Fighting games are actually VERY complicated and require crazy reaction time and memorization at the highest level. That's why I stopped trying to be competitive at them, just couldn't cut it and it stopped being fun to me.