University research studies and first hand metrics released by the apps themselves are not "anecdotal" my guy.
Since whenare universities credible on this?
As for app usage, like much statistics, they only show a part of the picture. Not the whole.
I'm admittedly not well versed in the minutiae of inceldom teachings, but my high level understanding is they primarily bemoan women (in aggregate) only "swiping right"/finding attractive the top 10% of guys, and (in regards to long term relationships/potential marriage partners) have a very strong aversion to women with high body counts. Which are very obviously behaviors that have been greatly exacerbated and facilitated by the ubiquity of dating apps.
Dating apps are run by algorithms designed to increase user engagement, so even then its anecdotal. Where's a reason that dating in real life tends to play out very differently. Dating apps removed or reduced a lot of the major factors like distance, cultural difference etc but they don't remove how those things play into one's preferences.
Incels have aversion to any women with a body count that isnt 0, and they also have an aversion to men with a body count. At the core is that the women aren't sleeping with THEM, and the men are "taking away" the women from THEM. Its a defeatist attitude, a self loathing one with no desire to improve oneself to change ones chances.
Its a wirrd thing where they think the natural order is that SOME woman SHOULD find them attractive, and so taking action to be more attractive to women is subverting that nature, and that in a vacuum those things wouldnt factor in. I've seen incels absolutely trash individuals in their community who even attempt to appeal to women, to reach out, etc.
Its ultimately a lot more about me than health than it is about actual sex or relationships. Some of these folks have women in their lives, sisters and mothers and still feel this way. Its wierd.
That being said it doesn't take long to figure out why women don't find these incels particularly attractive, their attitude is often abrasive, they usually have deeply underdeveloped social skills and the ideological stuff makes it even worse and incorrigible.