My friend seems very bad about managing his type 1 diabetes. Or am I just an ass?

I have a friend who seems very bad at managing his diabetes and its starting to become very annoying. For example, we had a night on the town last night with a few friends. At around 10pm, he declared that his blood sugar was low so we all needed to go home because he "was going to black out and die" if he stays out much longer. So we all had to cut the night early so that he can get home (after which he proceeded to drink at home for a few more hours). This happens often.

Like he is 27 years old and needs to be chaperoned? I want him to come out and have a fun time but I also dont want to sacrifice my fun, too.

His diet consists of general tsos chicken every day (no exaggeration), instant ramen, and chipotle. It gets so bad that he tests his blood sugar and injects himself at the table in a restaurant.

I guess what I am asking is if this is how normal diabetics are? I certainly dont want to say something to him if this is how it usually is.

Thanks!