Yeah, Gundam has always had this messed up side of it.
The original 1979 series is about a 16-year old kid accidentally discovering a giant robot his father made and it turns out he's the only one who can use it properly, and he figures this out when his space colony is attacked by the enemy, so he ends up being forced to participate in a war on a ship with other survivors from the attack. He starts off selfish and arrogant but develops into someone else entirely as he witnesses more of the horrors of war.
This has pretty much been the basis point for "Real-Robot" shows for Sunrise as opposed to the wacky, energetic "Super Robot" shows that was known beforehand.
The original is definitely worth checking out if you want better insight on how Gundam shows typically go. Fortunately, if you're short on time, you can check out the movie trilogy, which covers the entire first series.
The only really "Shouneny" Gundams would be G-Gundam and Gundam Build Fighters.
The rest are all about war, politics, space battles, and the like.