I am not sure what to make of this.
Pushing someone is never great but frankly I can't get all that worked up about it to the extent that I would say PW is terrible and H&M are angels - is that his intent?
Telling this story is for what purpose? Make PW look bad (it says they met to discuss their relationship so it wasn't just M and the press) so once again details are missing. Is it to provide another reason they had to leave? Well that's more plausible as PW is the next CEO of the firm so makes sense.
I think the bullying stuff was part of it and I suspect Harry was not willing to hear anything against M or felt it wasn't how it was being reported to PW and PW should believe them.
Ultimately (before we get the posters who are going to phrase this as domestic violence ) the language sounds off - a I know they are royals but it's like the poshest fisticuffs ever and as such a non story for me.
I had an argument with my sister once as teens - she chased me round the house with a knife - another time (older) I went to push past her as she was screaming her head off and she fell into the laundry basket
We were only physical those two times and am sure doesn't make either of us look good but ruin our relationship? Nah.