Yes the Democrats have done everything they can think of to keep him from getting on the ballot everywhere, and getting him removed from the ballot when he is already there. It is reprehensible and indefensible, but they've been doing it.
My concern though is RFK Jr. does hold some pretty leftist positions on things that are counterproductive on MAGA visions and goals, but he also is right of center and opposed to the authoritarian demands of the Green New Deal and has campaigned on closing the border and deporting the illegals.
They're kicking around on social media the idea of him being CIA Director under Trump. I can find nothing in his resume', bio, experience that would qualify him for such a position. I could see him as heading the EPA or something similar.