I'm curious. Are your son and ex-husband saying and doing things that make you feel inadequate, or is that coming from you? Since answers will differ depending on what that situation is, perhaps you could clarify. Your final sentence indicates at least part of it is coming from them, so maybe you could expand on that.

As for the exhaustion, you shouldn't be asked to do more than you're capable of, whether they're demanding it or you're pushing yourself too hard. I'm in my 60s as well. Our bodies are slowing down. It could be developing medical issues, it could just be the wear and tear of the years. We can only do so much about that.

Thanks.