I do a lot of writing too and you're spot on about all of this, especially the tropes part. See actual, good critics will delve into the substructures of storytelling and mythology and learn how they function. It's one of the ways you can tell if something has value. That's why Bob cannot talk about archetypes, or ancient themes, or why these stories get told over and over. He lives in the tropes hemisphere, where as long as anything is a throwback to anything it is cliche and derivative. They will sacrifice the value and history of a story structure for shitty twists and meta narratives. They don't want a story that resonates with the deepest emotions and archetypal echoes that fill our mind, he wants Deadpool to literally look at the audience and say "wow that's a little sexist, isn't it?" These idiots live to deconstruct and the height of media in their opinion is when it deconstructs itself.
Someone in this thread or another thread likened it to why video game critics don't like fighting games. Because they're actual games, they're the purest form of "video game," like a sports game. It takes skill, repetition, understanding a system, and becoming the best at it. They don't know what to do with that, it's too hard and alien. All these critics are the same, they don't actually care about any of this. Bob can't talk about why movies work, he would need to do a lot of reading and studying to figure out why stories MATTER. Not entertain, not distract, not deconstruct, but actually matter to people. He's just an MST3K character that takes himself extremely seriously.