Worse than being unable to Sleep...
… is being woke up at 8:32 on Sunday Morning, after you went to sleep around 02:30.
Wake Up! Now!
And not just woke up “politely”: your flatmate comes back at home and turn on his super-laudly-hard-techno-rock-massive-disruptive music.
I leave at you to imagine the rest.
Ah, by the way: just attached to his room, in the flat next to us, there a very Old-Style-Super-Polite English Couple. -_-