Yes YABU they are all trying to help you . If you don’t want help then write a letter to your GP refusing all treatment, but if you Do want help, then at least be polite to these people who are trying to do their best to help You.
If losing weight takes you off of some medication and improves your life, then why wouldn’t you at least try to do it?
If you are in your 90s then I can understand you wondering what’s the point, but as long as I can help myself to keep well I will and I honestly think that you need a change of mind set and someone to talk to to get you through this.
Why no book recommendations on Mumsnet.