Because that thing has an arm11 processor, 256 MB ram, and only half gig internal storage. That's 2009 specs.
Funny enough, China actually has some decent phones. 512MB+ RAM dual core chips. Though they are relatively weaker SOCs, with some dev work they would actually be really great budget phones.
Of course nobody buys them, so you're usually stuck with whatever you get in terms of software.
Good example here:
Jiayu G3 - 4.5 inch 1.2GHz Dual Core MT6577 Android Phone