My girlfriend and I are in a game my friend started a while ago. (We're playing D&D 5e.) It is his first game, but we all DM other games at the same time. I feel I have done a lot of research into DMing and my skills have improved a lot. I have taken a lot of notes from Matt Mercer and Critical Role. I feel as though my friend's DM style has not similarly improved and has become pretty bland.
The DM has us make multiple skill checks without consequences and other repetitive or boring tasks. His descriptions are usually short and uninteresting. For example:
DM: You're in a forest... roll Perception.
ME: rolls 18
DM: you see a pair of bugbears just walking around (he does this a lot where he states things we see but doesn't put a threat or reason)
ME: (knowing this, I try to make a reason) how much do I know about bugbears?
DM: Roll... ummm... Nature
ME: rolls 22
DM: you know... a lot about them.
ME: so I know they'd come after me if they saw me?
ME: engages by polymorphing one into a rabbit, other one smashes it and charges
initiative: fight was over in about 5 minutes because I cast slow on it, my party member shot it with an arrow, and I nailed it with a firebolt. dead
DM: You're still walking in a forest... roll Perception
DM: you don't see anything... roll Perception again
Outside of game he seems really excited about his story, but its like forcing down medicine to play sometimes. As a player, he's very engaging and immersed in the world, describing every attack he makes and such, but when he DMs it's basically "you hit, you deal x damage, next in initiative".
I've talked to him a bit, but he got a bit depressed afterwards. He's kind of a touchy soul so I'm kind of hesitant to say much more.
Is there anything I could do as a player to possibly engage him? Should I be asking to do things in game that I, personally, think he should be prompting me to do?
So my question is: as a player, how can I can inspire my DM to give more to his game than he currently does, without hurting his feelings or criticizing him?