I am afraid that gatekeeping is partially essential and somewhat desired, as an academic you don't have time to read everything and some sort of quick signals, albeit very flawed, can be useful to stop wasting time reading crappy science. If you don't gatekeep you will get a lot of crappy papers or papers that mention the same thing and it will waste more time from people that wish to get a quick sense of the state of a topic/field from quality work. An open source voting system would be easily abused, so it will end up to be trusting a select service of peer reviewers or agencies. Especially if a paper includes a lot of experiments and figures that can be somewhat complicated or overwhelming. What do think?
Has a bit of a leg up in that if it's only academics commenting, it would probably be way more usable than typical social media, maybe even outright good.
Calling it peer review suggests gatekeeping. I suggest no gatekeepind just let any academic post a review, and maybe upvote/downvote and let crowdsourcing handle the rest.
While I appreciate no gatekeeping, the other side of the coin is gatekeeping via bots (vote manipulation).
Something like rotten tomatoes could be useful. Have a list of "verified" users (critic score) in a separate voting column as anon users (audience score).
This will often serve useful in highly controversial situations to parse common narratives.
Yes publishing is broken, but academics are the last people to jump onto platforms...they never left email. If you want to change the publishing game, turn publishing into email.