Mr. Jensen repeatedly complains about the quality and duration of his sleep. He claims that he has difficulty falling asleep and staying asleep, and that he usually wakes up before it is time to get up. Mr. Jensen apparently suffers from:

Mr. Jensen suffers from insomnia. Insomnia is a sleep disorder which causes difficulties when it comes to falling asleep and staying asleep; insomnia also causes people to wake up earlier than they were supposed to, and to go back to sleep after that.

Other symptoms of insomnia are: tiredness, depression, irritability, lack of focus, etc.