AGAIN, no one is debating that RG3 isn't having a disappointing season and not living up to his potential. You haven't proven anything.
Luck, however, is overrated and can't be effectively evaluated yet, even after 3 years, because of his easy as hell schedules, year after year after year. Not until he has a more difficult schedule would we be able to say for sure whether he's as good as many people think he is or if he's just better than average.
So, if Luck can't be effectively evaluated yet, wtf can we say about RG3? He did good in a division whose second strongest competition was 8-8? Luck has been to the playoffs. He has beaten winning teams. He has lost to good teams as well. But, he hasn't gotten benched for being terrible and he hasn't gotten hurt from being a mobile QB. What he has done is take a team with zero run game (if Luck had Morris in the backfield, they'd be so much better off) and very little of anything else (we criticized stone hands Heyward-Bey, but the rest of the Colts have the same affliction, maybe it is contagious?) and still managed to make playoff runs. He beat KC nearly on his own. He turned around a team that could barely scrape together a single win without PFM. What exactly has RG3 done? He made a Subway commercial...
Even with that said, I don't think RG3 is a bust, at least, not yet. He has all the tools and if he can find a coach that can coach him (Gruden can't, let's face it), he could be a great player in the future. He would fit in very well in Chip Kelly's offense, IMO. He is actually very good at making short throws (his inflated completion rate stands a testament of that) and he can move when he needs to. If he can get his footwork down, his cannon arm can be useful.