I just want to add that when more established writers "shit on" younger up and coming writers, it's no reason to get all butthurt. It's a necessary part of the culture. It drives the youngins to know their place, and gets rid of the ones that don't have the heart to get past some hurt feelings.
Most writers I know had the same thing happen to them when they started out, with older writers handing out beatdowns or "not giving respect" to the younger dudes. Fuck that, new kids don't deserve respect until they deserve it.
The internet has leveled the playing field too much, in that newcomers instantly have a forum (no pun intended) to share their thoughts/pics/complaints with actual established writers. It used to be that you had to EARN the right to even converse with a real writer. IT took me maybe 2-3 years of doing ugly ass deadletters around my city before I even met a single other writer. And that was in a real city with dozens of active writers. And I wouldn't even dare paint the same spots as them until I was invited, which took quite a while as well.
So basically, if someone has been doing this shit for longer than you, shut the fuck up and take what they have to say. If you have too big of an ego to believe what they say, then good for you. Everyone in this game has a big ego. Maybe you'll stick around for a while. But the odds aren't in your favor.