You mean the creatures that much larger than anything on the island Kong was 100 feet tall while Godzilla was 350 feet tall. The MUTOs were like 300 feet tall. Unless the creatures on the island decide to work together Godzilla would fucking steamroll the island.The one MUTO was far smaller than the other MUTO I believe the female one. That one was still capable of damaging Godzilla. To act as if Godzilla could steamroll this island is being ridiculous. Not only that but Kong is much more mobile and aware of his surroundings than Godzilla. Godzilla dies when he comes to Kong's pad.
He was still more than twice King Kongs size. The main Skull Crawler and Kong are the two possible threats and Big G is 3.5x their size and has tanked much worse attacks
Kong literally gets up to Godzilla's knee, and isn't as thick as one of Godzilla's legs.
Even the Male MUTO has a wingspan as big as Godzilla, and still dragged a sub and Godzilla around. The Male MUTO would stomp the entirety of Skull Island, let alone the female, let alone Godzilla.
To be fair though, Godzilla might not stomp just because he wouldn't view anything on the island as a threat, rightfully so.