My brother is dying...

My brother was diagnosed with a terminal brain cancer a little over a year ago. They tried treatment all this time and have decided he is ready for hospice care. I've been a spiritual person in the past. I've been through losing best friends and family members before. I'm just getting to a point where I'm angry at God. Not sure if there is a God per say. I grew up religious but my experiences have shown me both presence of a greater being and feeling so hopeless that it's easier to believe there's no greater being. Because what greater being what let these awful things happen to people who have lived their lives in the light. Maybe just getting this out but anyone else know how I feel?