He got tired because of the insane complexity of the language, and in the video I linked he supports his complaint with extensive and damning examples.
His difficulties are characteristic of someone not seeking solutions to actual daily engineering problems, and instead getting lost in a maze of language lawyering.
If you approach features in terms of how they can be useful when coding, almost all of his difficulties never arise, or are easily sidestepped. For working coders that becomes second nature.
The additions since he bowed out improve the experience of production coders.