Whats wrong with this horse
Does your horse misbehave? Does he pin back his ears and refuse to do what you ask?
Horse sometimes resist us. There are reasons why a horse might not cooperate. Ask yourself a few questions. Do I confuse my horse by giving the wrong signals? Is the saddle hurting him? Do I ask him to do the same thing day in and out? Do I let him control me instead of me controlling him? Is the bit to harsh for my level of riding?
First lets look at confusing signals
If a horse has been trained by a good trainer he will know what is expected of him when the rider sends a signal such as squeezing with their legs to make him move forward.Now what if your riding, and your legs are flapping all over the place, but your pulling on the rein because the horse keeps speeding up? You are confusing your horse. But even worse you are punishing your horse when you pull back on the reins. If this sounds like something that may be happening you need to take some riding lessons from a good riding stable.
Secondly; Does the saddle fit your horse?
Most new riders and even a few experienced ones have no idea the kind of pain and discomfort a ill fitting saddle can do to a horse. If your horse pins back his ears or tries to bite your leg when you begin to tighten the cinch strap, you best take a look at how the saddle fits.
You need to know something about how the saddle works and how to choose the right one. Please for your horses sake. don't get info that is critical to your horse over the internet. The internet is full of misinformation. Buy a good book by a author that knows what their taking about.
Thirdly; is the Bit your using to harsh for you level of riding?
Just like saddles, bits can do more harm then you might realize. There are many riders who use a very harsh bit without realizing it. The topic of bits is huge and a new rider needs to get the right information. Again please don't rely on what you read on websites. I have seen many many articles that people just rewrite without knowing if the info is correct. Do your horse a favor and buy a good book on bits.
Conclusion
There are many reasons why your horse may misbehave or even scare you. It is your duty as your horses guardian to learn all you can to make life more pleasant for you and him. Get a couple of good books and start reading up.
Your horse is a friend and companion and deserves your best.