no comedy is timeless, and every time i revisit old comedies i usually find them less funny. a lot of them are predicated on being raunchy or insensitive for their own sake and thus age, well, let's just say, very badly.
i wouldn't necessarily say all talent has been sucked away, either. people in every generation complain about how the good old days were better, but don't seem to realize that a similar ratio of genius films and schlocky garbage is always being made, or that cultures evolve over time and thus so does their sense of humor.
it's the set of people who praise a very specific kind of comedy as the only "real" comedy: just being offensive and reaffirming their own sense of self-superiority, which isn't what "all comedy is based on tragedy" means, assuming that saying is true, which it only may be. that's not saying i laugh at everything - it's all a matter of personal preference.
some (metaphorical) exterminators will look at a house with a single ant on it and think it's more important to "fix" than the entire city infested with cockroaches next door. although well-meaning, they have misplaced priorities. meanwhile, the city is populated completely by people who think the buildings are made of bugs, not bricks. although those bricks might as well have been lost to the bugs, so let's build a new city. it could be funny, too