Grumpy and the Incurables

Old, grumpy, and cynical, this man in his 70s complains about being riddled with incurable diseases which he describes using a lot of profanity, but in such a way that you can't help yourself but laugh and feel sorry for him at the same time. He could be your Dad, your Grandad or perhaps you some day and this touches something in the reader.
He claims he is trying to reach out to fellow sufferers of the many diseases but he openly admits that this is only because he wants them to buy his book. He promises that if you buy his book he won't waste his profits on any good causes other than giving himself one final celebration or blow out as he says.
He thinks he is a Senior Citizen Influencer and he shamelessly pokes fun at everyone on the planet whom he describes as little hamsters so busy running around in the wheel chasing a lost cause, until they can't.
He is also disparaging about 'do gooders' and those who would try to save the planet, but there is a hint of 'tongue in cheek' in all he says, or is there?
Between the lines there is a serious side where he describes the suffering and indignities brought about by many of the conditions that he and millions of others endure. This book is not to everyone's taste but everyone should read it.