You have to deal with it anyway, so why complain? Just adjust your play style, play more patiently. If you're getting the opportunity to punish, it means you're winning the neutral. Stop overextending punishes and instead, reset to neutral with positional advantage and do what you did before to win.
I think people complain about match-ups like Squirtle and Luigi because their bread and butter doesn't work like it does against 80% of the cast. And many people have such a significant degree of autopilot, that they can't switch it up and play the match-up.
Obviously, this isn't the case with every player, but I'm sure it is with some. I stopped complaining once development ceased, because my complaints aren't going to get anything changed, they're just going to get me worked up. Instead, I figure out ways to deal with what I have trouble with, and I look at it with an open mind.
For example, I think that Sheik's throw mechanics are way too good. I can't count how many times I've lost because of my inability to counter it. So, instead of complaining, and looking for a new character to deal with Sheik, I really took a look at my play and figured out what I can do better to avoid being put into those situations in the first place.