Show some proof as I'm certain I either named him, quoted him or did indeed mean him as the individual who complained the most about food and adults.
Secondly, dude grow the hell up. You're 15 and you've got absolutely jack s*** to be down about, get a grip on your emotions and lighten up otherwise you'll spiral even worse than you probably have in the past. Stop letting what other people think of you control how you feel about yourself....I did and I've lost that stress and am much happier than I was a year or two ago. EVERYBODY is critical including yourself but for christs sake take everything with a pinch of salt! If you care so much about what people think of you and let that stress you out quite simply you are ****ed to no end....
You have nothing to feel bad about nor have to worry about other than schooling and your future. Do you have a job? (Maybe). Do you have a car with no doubt a car loan? Do you have to worry about a mortgage on your house or having to pay rent to tenants/landlords? Do you have dependents that you have to care for? The list goes on and on and on.
The past is the past and only certain things in life are meant to be remembered and it doesn't take a rocket scientist to work out what they are. I remember when I was your age (4 years ago

) and I had depression but I worked to kick that by realizing just how damn good my life was at that time even if some of the people in it sucked to high hell. I wish I was back in my early teens because I'm not looking forward to having to work my ass off to get somewhere respectable....