It never ceases to amaze me the number of people here that conveniently leave out the important parts to justify theft.
Discover the different streaming plans Netflix offers and how much Netflix costs.
help.netflix.com
It states very clearly "A Netflix account is for people who live together in a single household. Learn more about
sharing Netflix."
You agreed to this by using the service. I don't like it either but it is what it is. Netflix owns their content or the distribution rights to other content and can charge what they want for you to view that content.
You are not entitled to change their TOS to suit your personal feelings on the matter.