How will we deal with the problem of inceldom in a communist society?

It's not some great struggle. It's fairly simple.

Sexual liberation was not progressive but regressive.

Bring back one man one wife.

Depends on the type of NEETdom. If you are NEET because no one will hire you despite wanting job then you won't be a NEET under communism. If you are a NEET because you are just lazy then will can keep on being a NEET. I doubt many people fall into the second camp however.

Go back to r9k

How? Communism will not force someone to have sex with someone else.

see

The "one man, one wife" thing is a lie.

No way. I don't wanna get married or have children . Certainly to a not to a traditional house wife. I'd just resent her for getting to stay home and play with babies why I wage slave.

socialization will not help genuine incels, again, it seems to be clear that your pov, that of a woman, who has a woman's life experience, is insufficient for understanding this issue

That's not what happened on Stalin's train.

You mean the Warsaw-Berlin 1945 rape express?