Yeah, as funny as it is to meme on Infinite a Thwomp wouldn't be able to kill Infinite by crushing him like it did in the infamous DB. I think the main reason the Thwomp managed to even hoe Infinite like that in the DB was because it came out of nowhere obviously but since Infinite used the phantom ruby to amplify the gravity to the point it would crush his opponent. This amplification of gravity drastically accelerated the Thwomp's descent by several times which is probably why it got him the way it did. But in a normal fight Infinite wouldn't go down as easily.