I'm "friends" with Rainer Shea, or at least I was. I talk to him occasionally, though not in real life.
I don't completely trust him, but I don't completely trust anyone in general.
He still puts out pretty decent articles and analysis, yet in my opinion he is too close to the PatSoc individuals. I don't completely like his reasons why, but they still make some kind of sense.
In regards to Caleb Maupin, Rainer's explanation is that even though he has done really horrible shit, he says that some of what he has done has been exaggerated or made up by his detractors (I don't think that statement is true for the most part, but whatever) but because despite Maupin being a PatSoc, Maupin points out the neoliberal hypocrisy of our opponents and actors, such as neoliberals siding with the capitalist world order and supporting NATO's use of Ukraine as a fleshlight/battering ram, or of neoliberals wanting to basically fucking nuke China.
I haven't given up on Rainer, since he seems by all accounts to be a decent person who is willing to admit mistakes and flaws, and he understands how horrible and bad optics most of the PatSocs are, and there is something genuine about him that I sense.
That all being said, I hate Caleb Maupin and I agree that he really shouldn't associate with him.