Hi Onedayatatime.
Another sibling here. My brother was diagnosed with schizophrenia decades ago. To put it mildly, yes, it is extremely hard to manage this disease, I agree with you. Just know others have lived through having a mentally ill sibling and survived it. And keep in mind that your brother is managing this wild ride the best HE can, even if that seems impossible to believe.
Try to keep compassion in the forefront, even as you continue to look for practical strategies and solutions, many of which are on this forum if you search around.
Thinking of you and wishing you some peace.