The deep and dark web are being mentioned over and over again nowadays. We use our computers and phones connected to the internet and have no idea which the consequences might be.
"H0us3" does and excellent job by showing us how virtually vulnerable we are and what a great ignorance about these issues we have.
The film is mainly about a group of friends having a meeting after many years and talking about the topics mentioned above but the thing is...it's amazing because you never get bored and you want to know what the hell is going and will go on.
Technology and the Internet are not what they seem to be.
As for the person who wrote "painful to watch", I'm glad I ignored his review. It seems that that individual was expecting special effects and some avengers heroes to save us all. This is not the Marvel universe, this is a movie about friends, and ordinary (although some of them pretty successful) people discovering an incredible secret related to the dark and deep web.
You, as the spectator, will feel you're inside the film! Go and watch it. You won't regret it. :)