I don't know how to find that so I'll just pick other top point guards.
- Steph Curry 55%
- Jeff Teague 51%
- Chris Paul 51%
- Damien Lillard 50%
- Eric Bledsoe 50%
- Kyrie Irvin 49%
- John Wall 49%
- Derrick Rose 47%
- Mike Conley 47%
- Kyle Lowry 47%
- Russell Westbrook 46%
- Tony Parker 46%
Not looking good.
Ok let's talk numbers, but let's look at the whole picture.
First of all FG%. Let's exclude Curry for now because he's out of his mind this season and is pretty much an anomaly here. The gap between him and the best percentage shooter is 5%. (even if we're talking between his overall FG% and a respectable 48% for a guard the difference is still 5%).
Westbrook is taking about 20 shots per game, and he's making 9 of them. A 50% shooter would make 10 of them, which means that player is only giving his team 2 extra points compared to Westbrook, or in other words, Westbrook's poor shooting is "costing" OKC only 2 points per game.
Now, on the other hand, Westbrook is not only averaging 8.1 assists per game (5th in the league), 6.6 rebounds per game (1st among PGs), and 2.07 steals per game (2nd in the league), but with that aggressiveness also come more free throw attempts (he attempts nearly 9 free throws per game, making 84% of them) which could easily compensate for that missed shot as he's attempting 3+ free throws more than any other PG.
So you see, the numbers don't really support the idea that he's "hurting OKC", and there is a reason why his real +/- is 3rd in the league.
I understand why people might not like. I don't like him that much either. He has a bad attitude and I credit Durant for putting up with that, but if we're talking numbers we have to be fair. One more missed shot per game doesn't automatically make him "average" when he's offering so much in other categories, especially (because it's directly connected to his shooting stats) his free throw attempts.
Also, I find it hard to call him "low IQ" when he has more than 8 assists per game. He does have mental lapses at times, his aggressiveness could get the better of him at times, but low-IQ player is a bit harsh for me for an 8+ assists/game player.