God of War: Why Thor is Feared in All The Nine Realms

gamerant.com:

Thor is reviled throughout God of War's Nine Realms due to his cruelty, violent temper, brutality, and sadism. He is ruthless, showing no mercy to his enemies, and Mimir noted that his bloodlust was the only thing greater than Odin's paranoia, and many regard him as the worst of the Aesir gods.

Despite the fact that Thor was half-giant himself, he took sadistic pleasure in torturing and killing any giant he could find. His reputation was similar to that of Ares, who was regarded as the worst of the Olympian Gods in God of War. However, what distinguishes him from Ares is that he appears to have a sense of honor, as he despises cowardice.

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Thor's overall intelligence may be questioned, as he has frequently made a fool of himself or made stupid, reckless mistakes (quite comparable to his sons, in fact). For example, when Kratos learned that even with Mjölnir in hand, he would not be able to break through the ice to reach Thamur's magical chisel, he referred to Thor as a fool. Likewise, Mimir referred to Thor as «sweaty bawbag,» «fat dobber,» and «thunder lummox» in the Nine Realms when he called for the destruction of the Jötnar.

Brok thought of him as the big idiot, and Atreus thought the same after hearing how Hrungnir's body crushed him. Most notably, Thor's legendary hammer was stolen by the giant Thrym while he was sleeping carelessly. On the other hand, Thor is astute enough to recognize his own limitations and avoid attempting to take on Starkar alone, knowing full well that he would perish.

Thor is also extremely arrogant, which is typical for an Aesir, as he would go to great lengths to establish his reputation among the Nine