I think that if your paper is novel and based on sound reasoning and research (which usually means that it is supported by previous work and/or your own experiments) you should be able to publish it somewhere. So that's the best option. But, I would argue that "brainstorming" without any evidence is not really research. If that is what you are trying to publish, then you will be limited. arXiv might not event take that sort of thing (check out their moderation policy).
If you are trying to present scholarly work (especially without experimental evidence), you need scholarly sources as a foundation. If you present a hypothesis based on nothing (or worse bad/unreliable sources) then it will not stand up to scrutiny - which is what seems to be happening if you have received the same feedback multiple times.
I would suggest either
A) shoring up your hypothesis with background research or experiments and resubmitting to an appropriate journal
or
B) consider starting a blog that you can use to deposit (and develop) your ideas without the same scholarly expectations of a journal.
A side note, you should be honest with yourself about the viability of your hypothesis. Perhaps your topic is interesting but not well supported (I suspect this is the case if you have made it to reviewers multiple times). Or perhaps your topic is treading close to pseudoscience and your sources are just an easy excuse to reject. Either way, the solution is not necessarily to try to circumvent the normal publishing process. You should really try to properly support your ideas so they can be published.
Or "IAU Minor Planet Center"
– TheMatrix Equation-balance Jul 04 '23 at 23:26