Ok lets make this really really simple...
Anyone who denies that Predestination and Decree doesnt not exist is a kafir (disbeliever) because all muslims must believe that Good and Bad is from Allah (swt).
It is not like the common understanding of Predestination that we are forced and compelled to do what we do and then punished for it.
Rather Predestination means Allah Knows what will happen to us and what choices we will make, so He wrote it down, that writing down has no relevance or effect in our ability to chose.
eg. You went to a shop and I know you will buy 5 apples so i write it on my hand. You come out with 5 apples- does that mean i forced you into buying 5 apples?
No
In the same way, Allah (swt) can write down what will happen and what choices we make and it has no bearing on our ability you choose between right and wrong.
My advice to you is to actually sit down with a scholar and go through this topic... rather than randomly picking out ayat and hadith and pretending to know something you dont for the sake of arguing.
If you are sincere about clarifying your misconceptions about islam then you will be accepted with open arms and open hearts.
because....
"There is no compulsion in religion. Verily, the Right Path has become distinct from the wrong path." (2:255)