Exactly Angron is a berzerker that means he has only one method of attack. Pissing them off is the best way to beat them as you'll manipulate them into doing what you want.
Again... who was the one pissed off here? Russ, who attacked first? Or Angron who defended himself?
And that's the thing, Russ did
attack first. Angron still told him before the whole thing started to escalate that he should leave before the confrontation turned into something Russ would regret. So what you are saying with all this intentional flanking and berzerker manipulation nonsense is that Russ wasted
the lives of a number of legionnaires from 2 legions by forcing a confrontation with Angron, one that achieved nothing. That Russ is the one to blame for kicking off a needless fight that cost both legions several warriors. And as someone else has said, the lesson meant nothing to Angron because he did not care whether he lived or died. He might as well have died on Nuceria as far as he was concerned.
So if we take it your way, the Wolves did
lose the Night of the Wolf. They took needless casualties while failing to achieve their objective (if teaching Angron and the World Eaters a lesson by flanking Angron was in fact that). And you can say what you will, but the fact that the Wolves fought the "broken" legion in a head to head fight and came off worse in terms of casualties would have majorly stung their pride.
If we take your interpretation it makes Russ look like a reckless, arrogant idiot. But if we take it as Russ losing a duel to Angron, but having the Space Wolves stepping in, not by any specific design for that moment, but simply because they naturally had enough focus, discipline and tactical sense to keep track of the primarch battle where the World Eaters didn't, it paints a very different picture, one where the Wolves come out as looking far better than the World Eaters. And one that paints a more sensible picture of Russ too, one that fits more with his character IMO. It shows a Russ that was capable of thinking quickly and adapting, and turning a moment of personal defeat into something positive when his sons came to support him.
Curze also beat two primarchs one of which was hunting him on curzes own turf for months.
Also, please point out to me where Curze beat
two primarchs? Holding them off, while still quite impressive, is not even remotely the same thing as beating them.