
Richard F. answered 02/16/20
Advanced intellectual mentoring from a novelist and philosopher.
First: as stated, it's a question / problem rather than a thesis. A thesis would be (say) "Overall, the existence of the internet is better than its absence."
Second: whether that;s a good thesis to debate depends in part on what kind of assignment this is for - but it's almost certainly too broad. To see this, consider what it would mean to say that the minuses outweigh the pluses, in this case. This would mean, roughly: "We would be better of if the internet had never been invented." An interesting speculative conversation perhaps, but not of practical significance because we cannot "un-invent" it!
More useful would be to get more specific and ask (say) whether we are better off comparing the results of internet research with traditional methods. Or whether being "always online" is better than being able to access the internet only at certain limited times. These (and many, many others) suggest a wide variety of concerns about the effect of the internet on us.
Before deciding on a thesis statement, you need to ask what exactly a yes (or no) answer would imply: that identifies what your topic really is.
Good luck!
Richard F.