Most startups treat social media like a posting calendar, not a distribution or positioning problem.
A few common reasons it fails:
They talk to themselves. The content is built around company updates, features, hiring posts, launch announcements, etc. That only gets internal engagement because nobody outside the company has a reason to care.
They don't know who the content is for. "Founders", "marketers", "recruiters", "small businesses" etc. is usually too broad. If the audience is vague, the content becomes vague.
They post too late in the funnel. A lot of startup content basically says "look at our product", but the audience is not problem-aware enough yet. Better content often starts with the pain, mistake, workflow, cost, opinion, or insight the audience already recognizes.
They have no repeatable angle. One random founder post, one product demo, one trend post, one customer quote. Nothing compounds because people don't learn what to expect from them.
They confuse engagement with strategy. Internal likes can make a post look alive, but it doesn't mean it reached the right people or changed anyone's perception.
What they can do better: pick a very specific audience, write down the problems that audience already talks about, create recurring content formats around those problems, and measure saves, replies, profile visits, demo clicks, or qualified conversations instead of just likes. Also, founders and team members usually need to be part of distribution, not just the company page.