He didn't watch the gameplay nor the 2018 in-engine trailers, yet he was like ''meh'' hahaha.
He said ''This looks like a current gen game, and that is being generous.''
Then he said: ''he don't know what went wrong, is it the engine, or the studio, or even seriesX.''
Any logical person would conclude from these 2 statements that every aspect of the halo demo is too average or bad, so the issue can't be in just the environment design aspect of the game or the lighitning aspect..etc. It is a an overall failure and that's why he questioned the studio/engine/seriesX.
So why would he bother point at every bit of that disaster ? It's not his job, he was looking for next gen aspects to explain them in that trailer and he couldn't. You want him to explain a last gen game and why it looks bad. Your expectations of him is not realistic.