You are putting in the effort, but the needle is not moving. That flat, spinning feeling is real, and it usually means something underneath needs to change, not that you need to push harder on what you are already doing.
Two common versions of stuck are below. See which one rings truer for you right now.
Being stuck is not the same as failing. Often it means the plan that got you here has quietly run out of road, and no one has stepped back to choose the next one. When direction is fuzzy, everyone drifts and effort scatters. What helps is getting honest about where you are, deciding where you are actually trying to go, and building a plan simple enough that people can follow it.
If the same pitch that once worked now gets shrugs, the world may have moved while your offer stood still. This is not a sales problem, it is a fit problem. Customers, competitors, and needs change, and an offer has to keep earning its place. The work is to look clearly at who you serve, what they truly want now, and how to shape what you sell so it obviously fits.