html, css, and jQuery work just about exactly the same as they did a decade ago, nothing stops you from using tools you already understand.
If it was up to facebook then react would be the only framework used on the web; problem solved right? In reality, there are different tools for different needs and if you don't understand the specific problems a tool was made to solve then of course you're going to find it confusing.
Just because a tool exists doesn't mean you have to use it. These tools were created to solve specific problems that the creators encountered, if you don't have that problem or don't like the solution then why did you pick the tool?
The most baffling part is the strange sense of entitlement as if people releasing their work for free on the internet is a burden to some because now they have to decide if they should use this free option.
If you want ES6, typescript, flow, components, css modules, SSR, hot code reloading, "universal" code re-use, postcss, bundling, automatic-code splitting, dead code elimination blah blah blah then that's on YOU. Don't blame the tools because you are enticed by their capabilities but not willing to understand why and how they work. If you don't care about that stuff then problem solved: don't bother with them.