Correct.
his throws are inaccurate, he can’t read defenses.
Inability to read defenses and slow, inaccurate throwing might manifest itself in a high number of interceptions but that wasn't the case for Tebow in Denver.
Another factor that has to be considered is the number of times when in the pocket he was hurried, hit, or sacked and how quickly the defenders were able to put pressure on him. It wasn't as if after standing in the pocket for 5 seconds he'd be sacked. In some games defenders were getting to Tebow in under 2 seconds.
When you miss your target by at least 5 yards you don’t get a lot of interceptions, because the cover guy is near the receiver, which is nowhere near the ball.
The stats you link to show the problem. Completion percentage of 46, in general if a QB is under 60% the coach is thinking about benching him. QB rating of 73, remember the QB rating system is NOT a percentage, it’s an annoying piece of math is a max of 158.3, in general a QB sitting under 100 is again looking at the bench. He started 11 games and threw 12 TDs, that’s just barely hitting 1 a game, and also through 6 INTs, giving him a 2::1 ratio which kind of stinks, and he had 13 fumbles, 6 of which were lost.
From snap to throw the average QB is 2.4 seconds. Top shelf QBs like Peyton average 1.8 seconds. The fact that he “only” had 2 seconds shouldn’t have been a problem. Not if he was actually an NFL caliber QB, reading the defense before the play, knowing where he was going to throw the ball before the snap, able to do a 3 step drop and deliver an accurate on time ball.
He’s a nice guy. But he doesn’t have the skills of an NFL QB. A lot of great college players are terrible in the NFL, it’s a different game, a LOT faster, a lot more about mental prowess, and a lot less about physical prowess. He had an improbably run last year where he managed to get 5 wins with 10 or fewer completed passes in each. But his style of play doesn’t fly for the long haul, eventually your opponents figure it out. He needs to either really get his fundamentals down in the off season, or make the switch to RB with trick plays.