The incel meme has been around for a quite awhile, tho if you do a trend search it lines up with your observations, there is definitely an increase out of normal volatility.
Helps w/ the depopulation agenda, ff agenda, isolationism, etc.
Another I've seen is FDS and ideas that relationships should be easy and perfect always. Robots will be perfect in that regard and keep the population numbers low, Frank Zappa foresaw that.