The hook-shot as an attack does have some uses. You can use it if you short hop, air dodge instantly, and launch the hook-shot, then fast fall. You can tell if you did it right because it should look like you launched it without leaving the ground. You should be barely lifted off the stage to the point that if you screwed it up, you would wave dash in place. This is the quickest way to launch the attack. It can be used as a ranged attack with more range than Marth, though I would only use it if the opponent has a decent chunk of Life missing as you cannot L-cancel the landing after a fast fall. A slower, easier way to use it would be to jump at the opponent and launch it with a fast fall. This works against opponents that tend to shffle excessively, ie C.falcon. The final use would be as a ranged ledge hop in place of the ledge hop boomerang. It's quicker, though you can only use it if you have not already used it to recover before grabbing the ledge. The only time I really use the hook-shot attack is with a ledge hop. Other than that, use it sparingly as something your opponent may not expect in battle.
As far as the matches, you did fairly well. You have decent timeing, though the main problem I see is knowing when to use certain moves with that timing.you rely a little too heavily on the non charged bow. Like the hook-shot attack, I would use it sparingly as a move your opponent wouldn't expect. It seemed like it was your main tactic of approach throughout a majority of the matches. If you like that style, I would recommend using the short hop boomerang more often. Also, more bombs would be useful as an approach. If you short hop and throw a bomb, You can launch the bomb when you land in three different configurations. You can land and have the bomb go over your head towards the opponent(a very useful mind game), you can throw the bomb at the opponent's feet, upon landing, or straight at them. Other than that, Iwould work on wave dashing and shffling, though more importantly the shffling. You have a lot of potential. Keep at it.