u/WeatherSquare9899

Hi everyone,
This is all new to me and I wasn't sure which way to turn. My Dad turned 80 in May and the following month was diagnosed with stage 3 MIBC. In August it was upgraded to stage 4 with mets to the stomach and lung.
He's started chemo/immuno therapy this month and reacted badly. He's currently in hospital with diarrhoea and we're waiting on a CT as there may be a blockage.
He's debating giving up and I just wanted to know if anyone had any experience in a similar situation. I'm not naive enough to think everything is going to work out but I want to know what we're in for and if pursuing treatment will give him any quality of life.
Do the side effects from chemo let up or is this what we're in for for the next (possibly) 1-2 years?