Tomino moms:
0079: Amuro's mom stayed on Earth, refused to move with her husband and son, and then got disappointed with Amuro deciding to become a soldier
Dunbine: Shou Zama's parents refused to acknowledge their own son after his son fought tooth and nail to return back to the Earth, making Shou depressed.
Zeta: a workaholic with a screwed up marriage with Kamille's dad, then got killed when Ohm tricked/hazed Jerid into shooting her capsule
ZZ: Judau's an orphan
F91: a workaholic mother who hasn't returned to her family for a while, only got reunited with Seabook because both happened to be in the Space Ark
Victory: left Uso since he's very young because of her dangerous job in League Militaire, and the belief that the abandonment will harden him to the shit dystopia of late UC. Ended up being painfully and gruesomely decapitated by the wheelies. At least she realized she was a bad mom and was trying to make it up to Uso before her death.
Brain Powerd: Yu Isami was sick of his parents being so engrossed with their Orphan experiments and basically only using him as the pilot for Grand Cher.
Turn A: Loran's parents are missing, likely dead
Overman King Gainer: both Gainer's parents died from being mistaken as a part of the Yapan insurrectionist
Only Wilmit ended up being an unambiguously good mother.