Here’s some history from the Incel Wikipedia page:
The first website to use the term "incel" was "Alana's Involuntary Celibacy Project", founded in 1997 by a Canadian university student known only by her first name, Alana, to discuss her sexual inactivity with others. […] In 1997, she started a mailing list on the topic that used the abbreviation INVCEL, later shortened to "incel", for "anybody of any gender who was lonely, had never had sex or who hadn't had a relationship in a long time".
During her college years and after, Alana realized she was bisexual and became more comfortable with her identity. Around 2000, she stopped participating in her online project and gave the site to a stranger. In 2018, Alana said of her project: "It definitely wasn't a bunch of guys blaming women for their problems. That's a pretty sad version of this phenomenon that's happening today. Things have changed in the last 20 years".
When she read about the 2014 Isla Vista killings, and that parts of the incel subculture glorified the perpetrator, she wrote: "Like a scientist who invented something that ended up being a weapon of war, I can't uninvent this word, nor restrict it to the nicer people who need it". She expressed regret at the change in usage from her original intent of creating an "inclusive community" for people of all genders who were sexually deprived due to social awkwardness, marginalization, or mental illness.
https://en.wikipedia.org/wiki/Incel
It may be that this definition is no longer recoverable. I find that unfortunate, it’s a good word in that context.
The new reading is summed up in the single quote offered by the OED: “A world where Instagram influencers damage self-esteem..and lonely virgin men become ‘incel’ terrorists. New Statesman 2018”.
That, the new meaning, reflects misogyny. I suggest we now have three words in use: misogyny, sadism and this ill-defined miasma “incel”. The latter has been expanded to “incel culture” and become a media craze for what is more clearly expressed as misogynistic sadism. People of all genders who are sexually deprived due to social awkwardness, marginalization, or mental illness are left without a category. If anyone can think of one, now that “incel” has been destroyed, please suggest it.
The actual problem, misogynistic sadism, exemplified by the "Andrew Tate" brand get-rich-quick media channels, is indeed a magnet to lads drawn into such spaces by social media amplifier algorithms. The experience will no doubt be educational, the lads need to learn to recognize profiteering by algorithm and to despise it accordingly. Dress better, stop hanging around with lads who can’t clean up their act, your disease is a mindset biased by horrible nasty rich folk you'll never meet who treat you like food. As for the actual misogynistic sadists, they’ve always existed, they’ve rarely been so publicized but I don’t believe they’re incels regardless of how you redefine the word. They’re misogynistic sadists, and if they have social media channels, they're profiteering leeches as well. To help you distinguish on social media, incels do not own expensive cars or helicopters.