Can I negotiate an acceptance to print delay, post acceptance? Update: My withdrawal request was accepted and I was also offered to be published in the immediate issue of the Journal. I took back my withdrawal request.

Edit : Mentioning Journal

I have an accepted paper. But it is slated to appear in 2021. And both print and online versions appear around same time. I was hoping online would appear much faster than that, but its not the case. According to copyright I cannot host it on my website also for an embargo period of 12 months. So it's not even sharable, let alone citable. I have a followup paper already being written, and more ideas in pipeline that are built on top of this. This publication wait period defeats my whole purpose of publishing as I cannot share it with others and I cannot cite in furthur works. I cannot use it for advancing my career too. I also have plans to seek research positions or phd fellowships. I am kind of stuck. I cannot withdraw it now as it is already accepted. Is there anyway I can negotiate to get it out much before than the slated time?

Edit:

An excerpt from the copyright.


  
    Retention of Rights
  
  
  The Author/Editor may deposit an Author-created version of the Article
  on Author’s/Editor’s funder’s or funder’s designated repository at the
  funder’s request or as a result of a legal obligation, provided it is
  not made publicly available until 12 months after official
  publication. Author/Editor may not use the Publisher’s PDF version,
  which is posted on www.publisher.com, for the purpose of that deposit.
  Additionally, the Author/Editor may deposit the Publisher’s PDF
  version of the Article on Author’s/Editor’s own website or
  Author’s/Editor’s institute’s designated repository, provided it is
  not made publicly available until 12 months after official
  publication. Furthermore, the Author/Editor may only post the Article
  provided acknowledgement is given to the original source of
  publication and a link is inserted to the published Article on
  Publisher’s website. The link must be accompanied by the following
  text: “The final publication is available at www.publisher.com”. The
  Author/Editor is requested to use the appropriate DOI for the Article.


Update : I have made a gentle and polite withdrawal request citing delay as reason, to which I got a one line reply, "Thank you for your message". I don't know how to interpret this one line  reply. Does it mean that they will get back to me on this? or I should assume that it's been withdrawn?
It's hard to tell from the outside why they aren't posting online versions of your accepted paper now. If the publisher is the root cause, you could conceivably change their mind by negotiation. I would not be hopeful because they're likely to keep to the status quo purely out of inertia, but your objection would probably be filed away as a data point for when they finally decide to modernize.

On the other hand if the editor-in-chief is the root cause, the publisher is not likely to overrule the editor-in-chief, and you'll have to convince the EiC. Chances are the EiC has entrenched views of this (as opposed to the publisher who's more likely to simply be doing what they've always been doing), which makes convincing him/her harder. Still, you could try. Be sure to mention you have follow-up work already lined up.

It's unlikely that there'll be negative consequences for trying and failing. Your paper's already accepted; they're not going to rescind it for non-academic reasons.

One thing I would definitely check is whether you are permitted to upload preprints. You mention there's an embargo, but quite often the embargo is only on the accepted manuscript. You can still post preprints. Some publishers (e.g. Elsevier) allow you to post the accepted manuscript as well, on a non-commercial personal homepage or blog.

Edit: based on that paragraph, negotiation is the only way out, because they're preventing you from making anything else publicly available. If you have transferred your copyright then they can actually publish without your consent now (still, they might let you withdraw anyway as a gesture of goodwill). You say you haven't signed any copyright transfer, but that's not sufficient; the journal might have policies that say the copyright is automatically transferred upon acceptance or even upon submission. You'll have to check. If you haven't transferred the copyright, then you could withdraw and submit elsewhere. It's a decision you'll have to make.