Odin belongs to a single cosmic god? Then why do some people say that he can defeat the cosmic god?

No, Odin belongs to the father level and is a stronger column. In general, the heavenly father is inferior to the gods in the cosmic level and stronger than most of the following roles. However, due to the uneven performance of the characters in Marvel comics, sometimes even exaggerated, the heavenly father can sometimes exert the expressive force of the cosmic scale and even shake the realistic foundation of the multiverse.

Odin couldn't beat the gods. When the gods first appeared, they blew up all the heavenly fathers on the earth. But in order to resist the gods, Odin ordered the dwarves to forge an armor with the strongest metal Ulu, and then the fathers of heaven gave them some strength, that is, the destroyer. After wearing the destroyer, Odin may be stronger than the average single cosmic god. One man singled out a group of gods (although Raytheon summoned a wave of meteor showers for assistance, it had little impact and the overall situation was singled out), cut off a god's arm, parried for a while, and then was hanged by a group of gods. But if it is a one-on-one fight, maybe the destroyer can have a good record.

If Thanos doesn't hang up, the normal state is slightly weaker than the level of the Father. If he dies, he can hang himself.