Why can't places who claim to help the disabled community actually do their job?

I'm so fucking sick and tired of doing all the heavy lifting on my own. I'm currently registered with an employment agency in my area to try and find work, and the employment consultant I'm assigned to supposedly helps people who are currently on disability. I feel like these places talk a big game, but whenever I try to reach out to them for help, they're basically like we'll do XYZ for you when/if we can fit you into our schedule. I'm pretty sure the problem is too much and not enough to go around, so why not just assign one professional team to one client, and whenever the client doesn't need the services anymore, then move on to the next one. Same problem with state/federal agencies for the blind.