"Being fat is not something most people can control"

Bullshit.

You just don't want to control it. It's not like you're being force-fed and then restrained to keep you from exercizing.
You choose to eat what you eat and you choose how much you exercize. You have control over your weight, and under your control, you've become 390 pounds.

But don't worry: As long as you don't blame yourself, there's no limit to how fat you'll get.