Please help me by answering these if you can.

My grandmother who was nothing less than a mother to me left this world after fighting with a deadly disease for 5 months. She was such a pure soul, she helped everyone with everything, forgive those who mistreated her and even helped those people, even when she cried she cried in her temple. She didn't used to eat without taking a bath and doing her pooja. I was the closest to her so I adapted this firm belief of her in god. I was a firm shivbhakt myself. In all difficulties of life I believed jo hota hai achhe ke liye hota hai. In these 5 months, I did everything I did hanuman chalisa, bajrang baan, hanuman bahuk, manifestation etc and I believed that she would return fit and fine to home yet she left us. My questions are: 1. Why god made her suffer for 5 months? 2. I know that everyone on this planet has limited time but if he had to take her away, to unhe chalte phirte le jaate. 3. Why should we worship God if he loves sinners so much that they live peacefully and happily while the pure ones suffer? 4. Why people's stupid wishes are granted while my only wish was to see her healthy again and see her return back to home? And it wasn't fulfilled. 5. Why would he give me so many hopes only to break them? Please be kind.