How the hell do you accurately measure happiness? It sounds so abstract. Also who claims the authority of deciding this? I am honestly asking out of curiosity.
All of this was meant as a joke as well, I thought it was obvious, but I guess I should've mentioned that. I didn't mean to offend you pal. Sorry for not being clear.
Penpot is quite easy to use and show a presentation in. Use unsplash or pexels for images and the prototype view for presenting.
If you're not looking for FOSS there's a lot of AI presentation tools out there.
Lynx?