It seems pretty obvious. A doctor can't offer any solution to chronic problems of isolation and boredom, and won't do anything but to prescribe anti-depressants that will cure nothing. To post on the Internet can bring little bits of entertainment and interaction in people's lives here and there, but this is strictly a palliative. There's no magical solution to Synbios' problems that will come out of an Internet thread of his.
And in such a state, with such a prominent physical deformity that cannot be hidden, it creates an enormous, overwhelming hurdle when it comes to creating any kinds of friendly bounds with strangers since intrinsically, it repels others.
We're all lucky to be in perfect health, physical shape and appearance. Perhaps that sometimes we should be a little more thankful of that.
There's little to say. Perhaps that he should go to some kind of college if he doesn't do it already. He'll find a friendly staff of people to accomodate his special needs, and will be in a better environment to create bounds with other youths.
Also, I do recall someone in high school who suffered from the same affliction as he did. And the thing is that, surprisingly enough, he wasn't a pariah among the group, and neither a victim of any mockery. People talked about the odd form of his hand once in a while, but other than that he was pretty much like any other student.
The reason for that is that he had a tough character and was hostile when it was needed, just like any other teenage guy. So, that's probably important. If you learn to be mean and to stand for yourself, then people will have no choice but to somehow overlook such an handicap and they'll treat you like a normal human being.