Bard the Bowman (from Hobbit)

Hoah. Bard the Bowman. He who killed the mightiest dragon of all time, Smaug the Golden, in J.R.R. Tolkiens the Hobbit of course. Peter Jackson's movie version is now under my magnifying glass.
Bard should be one of the best archers in Middle Earth, at least among humans. Still his archery form is terrible and has all kinds of various errors. And the thing which he builds in seconds to kill the dragon, let me get to that in a minute...


Mistakes:

1. Sideways shooting. Apparent in pictures A, B, E and F. Bard shoots a lot of times sideways, which is a very bad technique only used in movies which don't do their research properly (i.e. almost all of them). In this way the bow cannot be fully drawn since the flank of the archer gets in the way of the bowstring. With a longbow, like bards', this is extremely bad form.
2. Bard uses two finger grip most of the time. This is also a bad idea, since with three fingers the grip would be sturdier and more powerful. Why use just two fingers? Bard needs extreme force in order to penetrate Smaugs thick scales, so using a two finger grip and shooting sideways are very stupid decisions. 
3. The moviemakers probably thought that because the Hobbit movie has so many different archer characters (Legolas, Tauriel, Kili, Bard), they had to invent some unique styles for each of them. This is completely unnecessary and leads to stupid decisions. Bard has given a 'style' of shooting with his string hand turned upside down. There is no proper evidence that this technique would have been ever used in history. This is because it's unnecessarily hard and useless form. It also makes the bow tilt more than usual (leading ultimately to 'sideways shooting').
4. In this promotional photo Bard grips the string with four fingers. Four finger grip is a beginner's mistake. Three fingers are enough, the least strong finger of the hand doesn't add to the force of the shot, it only make the string rotate around itself more than necessary when released. This can then effect the flight of the missile.
5. The arrow in this shot is on the wrong side of the bow. It is because the arrow is obviously computer generated and the editor don't know anything about archery. The arrow seems also a bit too long here. In the picture D you can see how many of the shooting scenes are actually filmed. Without an arrow at all! They are just added with computer in post production. This is a safety reason, and I can be okay with that, but they should ask on which side of the bow the arrow should go, if they don't know.
6. Back quiver. In the scene where Bard tries to shoot Smaug with his bow, he takes all the arrows out of the quiver, and that would be a smart move, since they are harder to get from behind a shoulder. A hip quiver would work just fine.
7. This thing! What is it? Bard's longbow broke in half (conveniently, and the string left untouched), then he stabs the severed limbs of the bow into thick wooden beams! Excuse me, but what?!? He has the strength of ten men, or then the beams are completely rotten, in which case the bow limbs would totally not keep in place there. The limbs are now some meter apart, so how does the string still reach from one end of the bow to another? He also uses his sons shoulder as a rest for the black arrow, which is the size of a spear. This self-made ballista could probably work if the string would be longer and thicker and the bow limbs would be properly mounted. Bot now... well, no. Why didn't Bard use the four-arm ballista, which was on top of some tower already, the one Girion (Bard's ancestor) used to shot black arrows towards Smaug in the first place?

Good:

Nice longbow, sad that it broke. No, you can't make a working ballista from a broken bow in a matter of seconds.