He's upset because: 1: He lost all of his life 2: Alkwan is almost dead 3: His moody swings caused him to end his friendship with voida 4: He's half-blind now 5: Diamond tech didn't survive the implosion even after GT tried to save her.
Note: This isn't the present time, this is a trillion years into the future, takes place when he's around 75 years old in human years. Credit to: Digital Hourglass for the BG and PR, and Xtrullor and Panda Party for the song