You don't have all the context. The language serves a serious novel purpose. You seem to be bitter about someone uploading a research paper (I didn't say it was a white paper) to arXiv.
You also didn’t share all the context. By all means criticise arXiv, but unless you provide enough context you have to expect to receive criticism back.
Personally I’d be fascinated to hear what your language was that warranted a paper submission to arXiv if you want to share.
All you gave us to go on was that you created a programming language (kudos) and wrote "a paper" with no further context as to why it merited submission and/or what it entailed other than it was rejected and you were nonplussed about that. Granted, that doesn't justify imo their accusation of the work as "worthless," that was rude and unmerited, but unfortunately par for the course these days as the Principle of Charity[0] on the internet was bagged, tagged, and buried at sea many years ago. If anything, the law of the land is the opposite now: Assume the worst/least if not explicitly stated, and that any reply/engagement is de facto adversarial. Welcome to the future, where ~~nothing works~~ everything is enshittified, even the social interactions.
I've never submitted to arxiv, is there an appeals/recourse process or some such, or is it just stuck in indefinite limbo or what?
Personally I’d be fascinated to hear what your language was that warranted a paper submission to arXiv if you want to share.