No, it's not pathetic, I'm just sick and tired of explaining the same thing to new users who create an account on these forums merely to say the Boltshot is overpowered, that Halo 4 sucks, or that the DMR should be nerfed. This is probably the 5th complaint thread I've even bothered to post on among 50 others. Don't feel as if your complaint is special to its cause.
I would extrapolate on why the Boltshot isn't OP, but SweatyBagels is doing a swell job, and he's accurately countered each and every one of your points.
I look at it this way:
Secondary Weapons:
Magnum - Good for headshots, medium-long distance, accuracy necessary.
Plasma Pistol - Good for breaking shields (with either single shot or charged shot), EMPing vehicles
Boltshot - Headshot capable, but with slower projectiles. Charged shot for shotgun-esque capabilities.
Each Secondary Weapon fills a niche. They are all equally balanced. They each have pros and cons in certain circumstances, maps, gametypes, etc.
Happy?