Well, I can speak from experience, that it can be extremely difficult to find swimwear that fits properly AND that covers enough, AND that looks good, when your standards for coverage are different than average. So while it’s nice to point people in the direction of alternatives, it’s pretty insensitive to straight out call it ugly. I’ve been on the receiving end of comments that were not as harsh as those, and it has really upset me, because the people criticizing my swimwear didn’t realize how difficult it was for me to find a bathing suit that worked, and how even though I knew it wasn’t ideal, it was still by far the best choice available to me at the time - and that I had already considered the alternatives that people suggested, and they wouldn’t work for various reasons.
But there was also a comment describing the long pants and long shirt swimwear an assault against freedom, and stating that women should NOT wear those. There may have been others, I don’t remember, but I would consider that viewpoint pretty harsh and intolerant, and the tone of the other comments about the “ugly suit” to be insensitive to someone who might have liked the suit and who is trying really hard to do something difficult.