I guess I echo a lot of what's been said.
On a professional level he's fallen off. Long video clips and recapping things instead of critiquing and introspection in movie reviews and comic stuff on the big picture, and less effort to make a convincing argument than just vent his spleen when he talks politics and social issues. It's like trying to make a review of just telling us the already public knowledge and going it's good or it's bad, and show off historical knowledge. That can be interesting, but in the wikipedia age, it's less a baagable skill. His SHIELD stuff actually sums up the laziness: write a 3 page article, 2 that recap the show, and one the give basic searchable stuff for the names they dropped and wild speculation about wha might happen based on comic book knowledge. Don't get me started on the Game Overthinker and what he thinks is an entertaining plot and entertaining jokes.
Non content related, he's always been a bit of an ass, but as time when on he pretty much accepted that as his true nature and ran with it. Now, I have no problem with assholes that are open about it, if they have the skills to pull it off. Bob was never THAT good in the first place, let alone now. He seems to want to yell at strawmen rather than make a point to real people. Okay, he doesn't think some things are censorship, but he states his beliefs instead of telling me why I should share them, and then goes onto twitter to condescend to those that don't see the enlightened view of the internet z-list schlub from Boston. And that's a relatively decent attempt at making a point. At his worst he comes off like his opinions are formed solely while waiting in line at the Starbucks like every hipster know-it all. Even that might not be so bad, but for a guy into the social justice thing and how we should show more empathy for others, so it's hard to take anything he says seriously when he can show none to people he disagrees with.
Maybe when he started he had merit because video blogs were new things and still catching on. If he premiered today, he does nothing not done better by others and would get lost in the shuffle.