I can't! It is.
I watched it a few months ago, it was fab but I haven't felt the need to return to it.
I heard someone say you have to "Watch Evangelion, just so you can say you've watched Evangelion."
That rings true to me.
You have to think in the context and time when it was released, thats like if you said lain is overrated but in the year 2138 when the internet has changed drastically, its all about the cultural zeitgeist and the effects on it.
i feel eva is something you should watch as a teenager so you can better level yourself with the angst. something about watching sexually frustrated children as an adult just feels uncomfortable so i opted not to rewatch it further :D
i wouldn't call the show overrated though, more like famous. people just know it. at least most of the people i know who've watched it didn't think it was anything that special apart from the weird shit going on in the latter half of the series which is just memed to hell at this point.