Something to consider...

Women aren't taking every ones jobs. In its intention, diversity based preferential hiring is a good thing. The Legacies now welcome demographics who have been barred historically and deemed unfit for the cockpit. They go out of their way to hire them. It is an attempt to right a wrong.

However there is a group of people who are more affected by diversity based preferential hiring than others. The Legacies are primarily out for themselves and not too concerned with fairness besides the two or three interest groups whom we all know about.

Put it this way: Initially the female 7% of 800 newhires in 2019 for airline X doesn't seem like a huge amount but consider this:

1:40% are military since oldtimers who have a say in the hiring department statistically are military as well. They are also guaranteed to have had high quality training.

2:40% are flows/CPP. This is a purely economic strategy in which the Legacies control pilot cost by keeping RJs staffed and wages low with a promise of a job or interview at the associated Legacy.

3: That leaves 20%. All of a sudden the pie for the remaining pilots becomes a lot smaller! The guy who lost the flow/preferential lottery through no fault of his own is now watching his peers, some of which settled for substandard contracts, get called while they wait. Add JetBlue pilots and Spirit Guys to the mix and your average non flow 10 year+ RJ captain is left with:

4: The final 10%. The experienced RJ Captain is left behind. He forces himself to go to Hiring events for gays, blacks, and women. He's not there to show support. He's there to beg for someone to look at his resume. He buys the tickets, the right colored suit and tie, the hotel room, and the rental car. He does it year after year even though it feels wrong. He gets conflicting information "keep doing what you're doing, try to get another type, when was your last initial?, do you do volunteer work?" He hears nothing meanwhile he sees 2000hour giggly girls in their 20's getting hired.

Now naturally its easy for a man in the final 10% to get hung up on the diversity preference. That is the pond he's in and those are the fish he's swimming with so one can understand his frustration. As myopic as it may be to blame the minorities for not getting hired I sympathize with these people. Many were dealt a bad hand. Just realize the real reason that you are left behind may very well be that you simply lost the RJ lottery.

My advice to people stuck in the RJ world is this: GET OUT!
You've lost the RJ lottery. They are not pulling many from your ranks for whatever reason. You are competing in the last 3-5% of the hiring pool. Go to a ULCC, LCC, Cargo or whatever it takes. Just don't stay in your CRJ, you have plateaued.