I'd contend that these aren't problems with HTML/CSS/JS, but with their categorical misuse under the guise of simplicity. Things like jQuery are orders of magni

I'd contend that these aren't problems with HTML/CSS/JS, but with their categorical misuse under the guise of simplicity. Things like jQuery are orders of magnitude slower than both alternatives and native implementations, and using many of these bloated libraries will only multiply the inefficiencies.