This game is campy. Get over it or don't play it.
As Grim said, the transformations differ by at msot abotu 2 seconds depending on your wii's load times. A character isn't broken on the stage if the only reason he's winning there is your own lack of countermeasures.
It's like Dean said about his d3 match against Toshi, he had lots of opportunities that were stopped simply because toshiba had a banana in the way. Snake has nades, and can actually somewhat camp on platforms. He also has mines and c4's to help with making these walkoffs void.
You seem to have problems that are counterpicks toward Snake, it's really stupid Attila. You may not be deliberately doing it, but everytime you hate a stage it's because * beats Snake on it, and just like Dean said again, if it's so impossible ban it, or learn the transformation times.
A matchup is not intended to be the same on every stage, Snake matchup against dedede is different on Siege, different set ups may need to be used. Is this a bad thing? No, in fact in my opinion, it adds depth and therefore banning the stage as a whole is both taking away a CP stage for no good reason (in that it can be prevented) and also reduces the games depth, even if only slightly.
It's sad that after a few years, anyone at all is still advocating anything dedede ban related.
Andrew mentioned that it's also possible for ZSS to do it, and so what? Two characters get a good CP stage just like everyone else, and it's dependent on percent so instead of complaining, learn the percent, learn to avoid it and become better at the game in the process.