Hmm… lessee… I think…
Best answer I personally can give, would be…
Take that sucker on the chin and learn from it. If you’re told “their head’s too big.” experiment with those proportions. if you’re told “the legs look stupid,” start scribbling out new legs till you find a pair that fits.
A lot of my childhood came with art criticism, and I was lucky to find some great critics at University, too. It’s actually really helpful to get that direction and perspective. I mean yeah there’s gonna be unhelpful criticism (“that looks stupid,” “you’re ripping off ___”), but never ignore it all. You don’t have to pander to haters, but not everyone’s a hater. And in the end it all makes you stronger.
Second best answer is ‘use reference’, no matter what style you’re going for. How you use it shines through in your style, and if you’ve already got one it can only make it more glorious.
Other than that, anything I can suggest would be the same as any artist I see perusing social media. There’s amazing advice out there, with some equally amazing art to back it up.
I may not be the best to ask, since even now I’m still learning. But, I guess we all do that anyway. Learning. *nodnod* Myup.