OK, there are two issues.

One, the OP didn't like his flight experience and wants to rant about it here. I don't blame him - it sounded lousy. That's fine. We can fight about fatigue and catering logistics here, but it won't solve any pressing issue.

The second is: the OP wants compensation, and probably deserves some. The complaint letter isn't going to work very well. Heck, I was cheering for the airline after the seizure incident!

Waaaaay too long, waaaay to much personal info, waaaay too much speculation.

Make the letter short and to the point, focusing only on facts clearly known to you:

- your initial flight was canceled and the flight notification system didn't work as it should have. The flight seemed to have been canceled due to crew fatigue. You feel you were not adequately accommodated after the cancellation.

- your next flight was delayed and then the catering was wholly inadequate.

That's what you should be asked to be compensated for. Leave out everything else.