I agree with your assessment here. I suspect Matt is the one who is finding combat in 5th ed. is boring and assuming, or projecting, that sentiment to the majority of the D&D community.
I don't think he's projecting it to the majority of the D&D community. He's saying
many people feel combat is kinda boring. And I'm sure it's true. There are many people who feel that way, many people who don't, and we don't really know the proportion between them and the overall community.
Thank you! When I saw the video title, I was expecting an edition war bit, so I was surprised when... Actually, maybe it was an edition war bit.
I think he laments the relative simplicity of the monsters and the things they can do compared to some of 4e's design. But, as he points out, he's working on it from a 3pp perspective.
Because when they tried to make it not-boring, a portion of fans got so upset about everyone consistently having interesting things to do, they actively slagged the edition for its entire run and at least a decade thereafter.
Now
THAT's an edition war response.
So nothing about this feel particular to dnd combat. If anything, I think I've seen more combat slogs in systems designed to counter this like 4e of PF2, when people don't know the system so make a lot of inefficient choices, and/or the dm builds encounters that end up sloggy because they don't understand yet how log things take to resolve or how certain monster defenses actually affect combat pace. But again, that's more about the lack of system mastery that a condemnation of the system per se.
Yeah, I thought we experienced a lot of slog in 4e. Granted, we played early, got fed up, and ditched early before they supposedly "fixed" the math. But at the time there were many people who were finding 4e combat a boring slog for some of the same reasons - tons of hit points on certain monster roles, running out of interesting powers and spamming the at wills, etc.
But I think the rest of MC's points about having an objective other than hit point obliteration are good ones.
I'd also add that there's a DM/player behavioral component to the blame here. Are the players ready for their turns? Are they paying attention to the other players on their turns or just tuning back in on their own turns? Is the DM too focused on the mechanics of their NPCs/Monsters that they aren't doing anything else interesting other than marching through the squares, counting up ranges, and rolling hits/damage, or are they trying to make the monster behavior interesting?