It's really not just a "new diver" thing. This is some of the stuff we have personally witnessed him do, and confirmed by by other random divers:
- beginning the initial descent before checking that everyone is ready, in multiple cases, leaving people on the surface with weight/mask/reg issues
- taking quick, sharp turns into hidden swimthroughs on heavy current wall dives, forcing everyone in the group to blow through a ton of air fighting to get back to where he turned off
- not checking individual air levels or general status checks during the dive, ignoring or not hearing tank bang signals directed at him, forcing people to waste more air double timing it to get close and alert him
- ending the dive when he is ready, not when the group is...and I mean the group is ready to end the dive, but he keeps swimming around in his own little world
- just a general careless "IDGAF" attitude underwater, like only pointing out things that he thinks is cool, like some 1" tall baby squid only he can see from 20 meters away and not the group of lobster that people in the group may have never seen before.
- On the boat, he really only gets interested in talking if there are hot women or mexicans in the group. Anyone else really doesn't interest him. This screws the boat crew, who live on tips; most people base their tip amount on how they liked the DM.
Anyway, glad you guys didn't die and he remembered to check if you made it back on the boat, I just prefer to dive with Sherif, Rich, Nat or Steve. And never Mario.