Giloblastoma brain tumor

My husband, 74, woke non verbal March 28 and was diagnosed at Duke hospital with a grade 4 giloblastoma brain tumor. He had surgery April 13, was sent home 1 day later, was home for 17 days then had a stroke, was hospitalized again for 8 days then died in hospice 3 days later. He had no signs of this, we were convinced with surgery he would get 10-12 months but a total of 45 days is all he made it. He was actually the best the 2 days prior to surgery, never the same after. His death was absolutely horrible and I am now struggling being without him after 56 years of marriage.