Ascending is neo-slang so there's bound to be some flexibility on what it means to people.
I can't say who is objectively wrong unless we come up with some kind of criteria for determining who is right.
I would say the fairest means is to find the earliest known instance of someone using the verb "ascend" to refer to sex and go with however they use it.
That said I'm not sure how to search for that since it's not a unique word, Google Books wouldn't be of very much help.
https://incels.wiki/w/ascend presently redirects to the "deincelization" article which seems like a crowded phrase (why not just decel?) and it has no section on etymology.
I appeal to any old-timers with a knowledge of pre-incels.is history (my guess is "ascend" predates this very forum and might go back to "loveshy" ancestor forums) to give some ideas.
Using the search funciton here for example...
https://incels.is/search/909664/?q=ascend&c[older_than]=2017-11-10&o=relevance
I think these records only go back to 2017 yet several were using the term back on November 8th/9th
Or are you incels just going to keep your bluepilled cope, unlike lookism users (like me for example) who went up ~3+ points due to it. Your always wondering why there is "chads" on lookism, well now you know! We can ascend together
Good. I've seen your before images tbh tbh legit incel inducing. You ascended buddy boyo tbh tbh idk why you're getting hate, you're the prime example of incel to chad and throw blackpills around. Post experiences of your life tbh tbh would be interesting to read, I hope I ascend someday too tbh tbh buddy boyo.. Did you get any surgeries tbh tbh? or you just looksmaxxed?
Slackbum Nov 9th
"This incel specimen has potential to
ascend into a proud normie"
"it's a great cope and actually helps with tendons, flexibility and posture. yogacelling ftw, join me incels together we shall
ascend"
So clearly it goes back further, but to which forum? Who coined the term?