Perhaps more accurately, aspects of traditional/whatever masculinity are under attack (rightly perhaps), but those aspects are couched in vague terms - toxic masculinity (what the fuck does that mean? Ask 10 random men in Bolton, or Kidderminster, or Plymouth and you'll get 9 blank looks) - or in quasi-academic terms, like Patriarchy, and very little of the subject is accessible to anyone who either doesn't understand those terms through academic/professional study, or with the inclination and ability to research those terms.
Toxic masculinity is a shit phrase - it neither actually makes clear what the problems are, and allows the interpretation that masculinity itself is toxic - hence the potential for seige mentality and the backlash.
By deliberately using quasi-academic/scientific terms and arguments in an effort to sound academic and scientific - and therefore right - you exclude 90% of the men, and women, who you need to persuade.
Foot, meet shotgun.