It can be scary to confront people because....

You don't know how the other person can react.

People are people, and we are people too. You cant control their reaction to your actions or words; but you can can control your mind and your thinking. So, keep focus on your thoughts and dont worry about what other people do or react. What it is in our control and what we cant control. I think that finding the edge between this parameter can make us less stressed and more mindful.

they target you they find out your weakness and do things to you even of they at fault

sometimes people you thought you could trust have their own agenda.

They likely to be in control of me, put me down or say something behind my back. Judge me not even there or when I go .little things . Not wanting to talk to me .hate that I'm not confident.

it's not gaurenteed you'll be the same at the end

Because you never know how the other person is going to react to you. You do not know if they will yell etc...

I realize that I might not know everything about what I am going to confront them about and I don't have any way of providing a comeback with new information... I also don't want to look like someone who is wrong all the time.

That your feel betrayed and people will let you down if you cling to them which I've learnt and been hurt of and if seeking help they don't wanna know .

People may become aggressive from the bloom. They might misundertand something said and become defensive.