What review did you read that misled you? I am not saying you didn't read that, just wondering. Too many of these "mobile" sites are run by people who will only use an iPhone (*The Verge cough*) so they don't do the deep dive into the experiance needed to find problems that won't show up on the spec sheet. It is sometimes hard to know who to trust.
Probably my favorite journalist in Android right now is Russell Holly. He does very in-depth reviews and he was frank that people should have bought the 6P instead:
http://www.androidcentral.com/review-lg-nexus-5x
Droid Life also picked up on the bad performance of the 5x:
http://www.droid-life.com/2015/10/30/nexus-5x-review/
I sympathize with you though, there were a lot of bad early reviews. People just love to be Nexus cheerleaders even when the devices don't deserve it (*Nexus 9 cough*). I knew as soon as I saw "2GB of RAM" it was a dud personally. That is not enough RAM for an Android flagship.
I don't own the 6P either, it is too big for me. I am basically waiting around for either a crazy Galaxy S7 deal or for Google to release a Nexus 5P later this year. Right now the 5 inch segment (outside of the S7) just sucks. It isn't Android's fault, it is just a weird window of time when the devices the market is offering at 5 inches all suck.
If I had to get a phone right now (like mine broke) I would totally float by on some cheap 2014 Moto X until the market had something worth buying.