This claim is completely specious. What they are talking about is the 9 to 1 ratio of men to women on Tinder and other popular dating apps. There are other places to meet women. In fact, I read today that on many college campuses women vastly outnumber men, so that's a place where the supply and demand is reversed. A lot of these guys seem to also think that they are owed the woman of their dreams and it's a rip off that she's not looking at him twice. Newsflash - supermodels are probably not going to be interested in you. Look for a regular woman.
On the rest of what you wrote, I entirely agree.