I'm grateful I have a roof over my head. It tends to leak. It gets baked by the sun all summer which means the flat is insufferably hot. It slopes and I hit my head periodically on bits that I should know are there. I have to paint all the ceilings every year to cover up the black mould. There's a hole in the kitchen ceiling the council won't fix.
But it's a roof.
Consider not only those who don't have one but don't appreciate the one they have.