From all the groups I've been in, and now all my friend groups, gender has never been an issue.
And we also don't ever kick people, we're not elitists.
Sounds like the wrong kind of people to be with, no matter the skill level of all involved.
Also personally, if I need to find a random(s) raid group I go to The 100 instead of LFG. People seem to be far kinder and happier (if you don't join an elitist group of course!)
Might even find some more people to add to your friends list, that's what I did
Shout if there's any questions