That there might be why you haven't learnt to hate Email (or other forms of asynchronous communication). If you want to learn to hate, try running a few mildly successful Open Source projects. Or try participating in other lame company flame email thread.

The fundamental problem with email (and other forms of asynchronous electronic comms including Github pull requests and Facebook messages) is there's little burden on the sender. The entire burden is carried by the recipient. It's too easy for the sender to turn impulse into wasting someone else's time. Snail mail at least costs a stamp and a trip to the letter box.

TLDR: Right now email doesn't scale

The fact that an email is easy to send without knowing the recipient is a huge benefit of email. No other electronic communication system offers this benefit (and unfortunately it enables spam, but that's an entirely different discussion).