On here, and across the web in general, I get the impression that people think Ted Cruz would be the weakest of the three major Republican candidates against Clinton. Can someone provide a few reasons why people think that?
Likability matters in a general election and Cruz simply has none. Trump at least has charisma and swagger and Rubio has youth and optimism (technically Cruz isn't even a year older than Rubio but he might as well be 80 years old). Cruz is detested by everyone who comes into contact with him and is transparently phony, power hungry, and worst of all, generally creepy and disturbing.
I realize many would say the exact same thing about President H. Clinton (mostly based on misguided sexist attitudes), but Cruz is objectively MUCH MUCH worse off in the personality department so that says it all.