Phil Collins has made some great music with and without Genesis and it's the way I will always like to remember him. I'm also aware that he has a degenerative illness which I wouldn't wish on anybody.
However, his later performances where he's sitting down and trying his best to sing the way he used to are painful to watch, even if it was Genesis' farewell tour. he was out of tune most of the time and you could barely her him. Just awful.