Perhaps working with your Father and Grandfather is affecting you and making it natural to be negative because
it's all your hear? Do you have to continue working with them? If so, then it might help if you volunteered at a hospice, hospital, soup kitchen or habitat for humanity etc
to give you a perspective of gratitude. I'm in AA and going to
meetings helps me see the good in my life.
The great news is that you're aware of this problem and now you're working on it. Maybe you should have a glass
jar at home where your wilfe and children can point out each time you make a negative comment and you put a quarter in the jar. Then once every few months your family
uses the funds to do something special together or donate
it to an organization you all want to support.
I hope you continue your awareness and willingness to
change your negative ways...it's the key to your happiness
and mental health!
Annie