Strong disagreement on this.
He lost his father. He lost his evil sister. He lost his brother. He lost his home. He lost his family. He lost vs. Thanos, and he lost several of his Avengers friends because of a slight miscalculation that would have prevented the snap.
He lost everything, and at some point, there was a line that was crossed. And when that line was crossed, he turned to food and alcohol nonstop. That’s believable.
EDIT: that said, Rocket enticed him to join when he mentioned there was beer on the ship. I want to know kind of beer. If it’s IPA, I lose respect for Thor.