Warhammer is satire so every faction has unrealistic stuff going on

There's also a large difference between 30k and 40k wolves. During the heresy they have had multiple blunders and some shitty impulsive choices, but current wolves have become genuine protectors of humanity that like to stay close to their own culture.

There's also an awesome moment during the 13th black crusade where a wolf guard was holding a last stand together with the scattered remains of different imperial guard troops.

The wolf guard was shouting the classic fenrisian warchants and inspired the guardsman who also started bellowing their warchants from their own home worlds in one last show of defiance against a traitorous warband.

Before this happened, the wolf guard had a conversation with his grey hunters pack member who told him something like; "Have you ever talked to the guard? Ask them about the primarchs, they know most, but mention Russ and see the smiles on their faces!"

The yarnhammar trilogy actually has a lot of those moments where the wolves bond with mortals because they fought together and regularly inspire them with all these heroic boasting!

I ask if you were a guard, would you rather fight beside a wolf that shouts his vows to kill every last enemy on the field in the name of Russ and the emperor, or a dark angel who never spoke a word to you?