He can't possibly have experience with ALL males of 25 - 35 in the industry. Making such a general statement can be perceived as misandry.
EDIT:
My reaction was similar to how some people react to "I'm seriously considering leaving the field of software because I'm tired of working with 25 - 35 year old immature bitches/sluts ."
I will consider the comment on reading comprehension and sensitivity.
The gender pronoun wasn't actually relevant but thanks for doing research!
Georgieporgie is tired of working with 25 - 35 year old man children. How is that hating all men or generalizing to all men? In fact he specifically said "working with" as in he actually worked with these people.