It sounds like he's one of those DMs that think that Psionics are overpowered, because, I don't know, people think Psionics are overpowered, even though they're very clearly inferior to most casting classes. Is it possible that he thinks that Psionics are overpowered and he has to nerf the hell out of them to make them fair?

Also, tell him that Clerics really don't need any help.