Thank you for sharing your opinion. I wanted to add my thoughts...

"Secondly, it is doubtful if happiness arises at the absence of suffering. A man that is not suffering any lack or health issue may still be unhappy - unhappy about the state of the people around him for example."

I would say that being unhappy about the state of people around oneself is suffering. We have the choice to respond to our surroundings however we like, if we are unhappy about something it is our choice to do so.