As many have already mentioned, I think you need to consider his channel from the perspective of his target demographic... if you do, you'll be able to appreciate the value he brings to the hobby.
I disagree with the suggestions that he should spend time reviewing or listening to higher end/reference/end-game gear because it wouldn't provide any value to his followers... if anything it would be a disservice. Imagine if Edmunds only carried reviews for Rolls Royce, Bentley, Bugatti, and Maclaren, etc. The average Joe would have a hard time knowing if Ford, Toyota or Honda have any redeeming qualities ... all the while being constantly reminded of all the great features they are missing out on. The vast majority of us have a budget and there is probably gear that we would love to try but can't afford. Imagine if that unobtainable gear was the only gear being reviewed... it would be really frustrating.
People like Randy help the average Joe understand how they can get the best performance out of their budget. Just like people are able to upgrade their car, scotch, wine, and food preferences as their budget increases, so it is with audio equipment. Randy is helping people traverse the lower end gear so they can be more informed and enjoy the hobby the best they can.