Going to try and help this topic out a bit. This is for everyone having problems with the demo and is not directed at anyone specifically. This is gonna be a long post so get ready to read, but I think it needs to be said.
Know this: everyone was bad when they first started playing monster hunter. I don't think any fan of the series will honestly tell you that they were good at it from the get go. When I think back on how badly I played when I first started, I laugh. Fans will tell you that the series is great, but they will never tell you it's easy. There is a rhythm and a pace to it. Once you find that, you will start to get better much faster. The poblem is, its near impossible to teach, especially through a forum. The easiest way to get into monster hunter is to have a veteran sit down with you and teach you what you need to know as you need it. There is a lot to learn in the series, and it can be overwhelming to have all that info flood you at once. This is partially why we say the online is great, because it gives you a chance to meet with better hunters who can help you where you're at.
There are a couple of topics that are near impossible to teach, and must simply be learned. Everyone thinks there shoulf be a true lock on when they start. I thought that myself when I began. This will sound crazy, but at the level of play necessary to take down some of these beasts, a lock on would be imprecise and disorienting. Don't worry, by that time camera control will be as easy as breathing. It seems like artificial difficulty now, but to veterans it's second nature. The soft lock this game adds is perfect, as many times all I've needed in a fight is a quick re-orientation due to the camera panning too slowly in previous games. If you want, I can try to explain it, but I can't guarantee it will make sense to you right now. A lot of people complain that the lagombi in the demo moves too fast. Compared to another monster in the series, the barioth, lagombi is standing still. Also the barioth does a lot more damage. My friend's first hunt against barioth was with two other people who had never fought it before. When they found the monster, they failed the quest within a minute from all three of them dying. Nowadays, he could solo it with little trouble.
Another thing: the controls are not bad, nor are they good, they do exactly what they mean to. They are different from every other game you have probably played. It is really a matter of learning how everything works. Learning your weapon's combos, how they link to each other, and what you can and can't do with your weapon out. There is a digital manual with demo that you can access through the home button. It does a fair job of explaining how you do things. However, knowing a combo, and knowing how to use it in a fight, are two different things. You will rarely be able to sit there and swing away. You cannot afford to have tunnel vision in this game. I might be attacking a monster's leg, but you better believe I keep an eye on that tail that can whip around.
Load times. We know. They exist. They aren't as bad as they used to be though. From a vets perpective they seem crazy short. The load time from choosing your weapon to quest start is about 9 seconds for me. Was closer to 30 on MH Tri for wii. The load between zones is only two seconds. Its really not a big deal, and sometimes having separate zones can save you from death as it gives you somewhere to hide while you use a potion.
The last sticky problem is how long animations take. They designed it this way for a reason. Every move you make has to be deliberate. You have to constantly be thinking about your next move based on where you are and what the monster is doing. In most games, it's simply a matter of have an itchy trigger finger on the dodge button. That doesn't work here. While right now you don't know the monsters patterns, once you do, you can far more easily make the appropriate decisions on the fly. Knowing when it is safe to take a potion can be the difference between life and death. Unless you are certain you have enough time, wait and avoid the attacks, or leave the current area and go someplace safe. I usualy take five minutes with anew monster just avoiding it learning to read its movements. Any attack that does significant damge has a tell for it.
Long story short, the greatest determinant is player skill. A pro with no armor can take down the last boss with ease, while a noob can have the best equipment in the game and still get beat by the first boss. It's okay if you're not good at it. You will get better if you stick with it.
The only reasons I can think of to not give it a try are:
You have to have a deep engaging story (the story is closer to mario level than shakespeare)
You have to have the best graphics ever (in which case, why did you buy a wii u?)
you do not have the time necessary to invest in the game (to get the most out of it, you have to spend time at it)
You do not like difficult games (mh is FAR from it)
If those are your reasons, I can respect that, just go somewhere else now. That's not what mh is about. I could talk about tutorials now but this has gone on long enough.