I posted this once before but will do so again for the stat nerds.
Rondo's career FT percentage is 62.3%.
If he continues this pace for the rest of his career and ends up playing more than 500 games, he will end up with the lowest FT percentage of any guard in NBA history (>500 career games). Al Attles is currently worst at 63.2%.
Lowest. Ever.
Even if you extend the list to include centers and forwards, he would still be one of the 50 worst free throw shooters in history. The other people on the list comprise a "Who's Who" of NBA stiffs (Dudley, Kite, Ostertag, Vranes, Perdue, Koncak, Causewell).
I'll leave the debating to everyone else, and I happen to love his game, but what I take from this is that Rondo is not just bad - he is historically bad given his position.