Nah, they're all just butthurt men who think that "only THEY can draw half naked 日本动漫 characters of the opposite gender!" In all honesty, those people are complete and utter idiots who need to learn something called ~Equality~
But yeah, that's basically it. 由 fanservice, they think that this 显示 is a girl's equivalent to their "Women Stripping" 日本动漫 and they aren't happy about it.
Seems like this 日本动漫 is centered to girl fans. I think it depends on where 你 will focus on. If 你 want to focus on the muscles, then go on. Nobody forces 你 not to. In their case, that's what they had their heads on!
Although I also think that the funny scenes (Haru getting all worked up on choosing his swimwear and Rei with his "beauty-fetish" are the funniest!) and the 心 pounding tournament is worth watching, since personally, I really like sports-themed animes that can make me feel excited, ever since Prince of Tennis, to Eyeshield 21, to Giant Killing, to Kuroko no Basket, and so on. The theme is also about team competitions and friendship.
It's not all 粉丝 service. (Tho, yeah, but not totally.) It's not ecchi 或者 hentai 或者 anything like that. No groping 或者 molesting is involved. Just pure men with half-naked bodies trying their best for their swim team.