The main thing that has cut the MW population by close to 50% has been the introduction of the WW1 arena, not the actions of any squadron in particular. The squadron you're referring to has been doing this for quite some time and really hadn't affected the population numbers at all. Once the WW1 arena came out, that is when you saw a dramatic decline in the MW population.
However, I do agree with you about how some squadrons operate. It was the main reason why the 479th moved from Knits to the Rookie side because of the steam rolling/dog piling/milk running that was going on against undefended or the lowest numbered side.
Also, to be fair, the squadron in question can put up a good fight. Sadly though, those members of the squadron that will fight are few in number while the most care nothing about a fight and would rather do whatever they can to avoid it. It's also amusing seeing certain members of that squadron that couldn't fight their way out of a paper bag thump their chest and point to their score as a show of how good they are when it's clearly gained through manipulation of the scoring system rather than any skill, right biggamer?
ack-ack