He criticizes Trump for being a populist who didn't follow through on any of the promises that got him elected, and he criticizes the establishment in general for being a one-party oligarchy. I don't think he's shilling for the right at all. In fact, except for free speech and vaccine/mask mandates, I don't know of a single issue on which he agrees with Republicans. But it's true that the vast majority of his criticism targets the American left. I actually just listened to an interview he did with Triggernometry where he explains why; he quotes someone (can't remember the name) who basically says that if you want policy to move left, you have to push Democrats left. Sure you can complain about Republicans opposing progressive initiatives, but everyone already knows about that, and Republicans don't claim any different. The Democrats somehow still have a veneer of progressivism, but by and large they don't back it up. They also do the same things that Republicans get (sometimes rightly) called out for, but few seem to call them on it or even be aware of it. That's why Dore leverages most of his criticism at the left.