You are right, it’s a battery. A battery that you are calling a “train wreck” and you call giving it a fancy marketing name “lipstick on a pig”. So you obviously think there is something fundamentally wrong with the battery, and not just the name.
If you are going to wait until better tech is available, you will be waiting forever. Original iPhone was slow and lacked 3G. Original Macintosh was starved for RAM. Original Apple Watch was very sluggish. They all got better, fast.
It’s not meant to be used when you are on the go. Sure, you can take it with you, and use it in various locations. But in every use case you are more or less stationary, and the device can be plugged in in that kind of use. One exception might be airplanes.
And there are no battery breakthroughs on the horizon, just iterative improvements.
Ah, you want something like regular eyeglasses, with AR? That kind of tech is long, long, LONG ways off. You might have something like that if you just use some simple HUD-like interface. But that’s not what Apple was going for, they wanted a full-fledged GUI with robust apps.
But hey, apparently this device does not suit your wants and needs. There is a simple solution to that: don’t buy it.