This is an appalling, exploitative employer. They have overhired at a furious rate in the last few months, purely so they can have more therapists on the books. But most therapists hired in the last few months still only have about 5-10 clients, meaning it is literally impossible to make a living.
I can't emphasize this enough: the company hires you on a 'full-time' contract, makes you sign a non-compete so you can't work for other private providers, gives you about 5-10 hours of pay per week, and then condescends to you about how this is a normal situation for LPs. I hope that in time, labor laws will make this kind of thing illegal. For now, it doesn't matter how desperate you are for a job, just don't take one here. There are other options out there where you'll actually make an income.