I like aimpoints as well. I have a couple of them, an eotec, the old bushnell holosight and a vortex strikefire. The aimpoints beat them all with battery life. I know some folks just leave them on all the time and replace batteries every 2-8 years depending on model. I wouldn't worry much about the eotech being junk, as long as it wasn't a knock off. The big old bushnell I have, doesn't have the metal protector on it and it has faired well for years. I got it used with about all of the paint knocked off and big gouges in it. I ended up sanding it down and painting it, but no doubt someone abused it at some point and it still works fine.
The new aimpoint I got is said to be good for 80,000 hours on an AA battery. I think the old one I have is around 20,000 hours before the new led. Behind the aimpoints I like the strikefire. I can't remember the battery life, maybe around 2-3k hours, but it take a fancy sub cell battery that is not common. Maybe cr123a or something similar. They shut down after 6 hours.
The eotech takes an AA but just 600 hours. They shut down after 8 hours. Sorry to not nail down the specific times, it's late so just going off of memory and that could be a bad idea.
I don't keep them on all the time so it's no big deal to me. But if one will run for 8 years on a AA and the led will burn for hundreds of thousands of hours that may make a difference to some folks. I just like them because they are lighter than the other ones and use an AA battery that doesn't have to get switched out often.