I remember seeing you back in Source, even before this, so the transformation is really impressive.
Personally, I've been in decent shape all of my life (and I'm pretty old now), so I sometimes take for granted how hard it must be to really push yourself when you aren't.
Fuck the haters. You don't have to prove shit to them, you did something a lot of other people wouldn't take the time to do, and most of them are jealous of that. Be proud of yourself for that, always.