Is it problematic? yes. Is it evil? no.
As long as these gender-exclusive spaces don't preclude people from participating in wider society, it's fine. I can live just fine knowing I'm not welcome in womens safe spaces. I think most women are okay with not being invited to the boys weekend.
Just overall this seems like a non-issue. Where I draw the line is things like, men not letting women into certain jobs, or barring them from voting, etc. Basically if you prevent people from participating in society in some way. That has nothing to do with people wanting their own spaces.
Having been a man my whole life, I have never struggled to get into any female-dominated hobby group etc. It's not an issue whatsoever.
Maybe female-dominated friend groups, but those usually contain more men than their male-dominated counterparts.
Some men just reaaaally wanna portray themselves as victims of gender discrimination.