In this context, I think disclosing my emotions towards the language tells others that while I dislike PHP the way Heroku phrased their "makers at heart" was a positive sentiment that I could agree with. It seemed relevant.
Why do I hate it at 80%?
Because it burned me in the past. Because it makes doing things right hard. Because other people make the same mistakes over and over and yet I still have to use it on occasion.
It's an emotion built up after years of negative experiences. My emotional experience with PHP went from Interested to Excited to Cautious to Wary to Hateful.
For me, PHP was the friend that promised the moon and when he did show up he came with week-old dried out cheese instead of the moon that he promised.
Cumulative bad experiences, especially when larger factors (legacy decisions, inertia, switching costs, etc) force you to continue having those bad experiences, leads to negative emotions.
Call it extreme dislike if you want, but for me it is a lesser form of hate.
Note that this is all personal description. Perhaps it was the timing (04-08) perhaps it was my level of experience, perhaps it was bad luck. I realize that some people have unanimously or mostly positive experiences with PHP and I'm not trying to diminish their experiences.
It actually doesn't. It makes doing things wrong easy. And no, those are not equivalent.
PHP has a unique combination of terribleness and popularity, though, and that's a bad mixture.
Playing devil's advocate, perhaps it's even noble to hate a non-sentient thing which one believes impedes the progress of sentient things.