HTTP 1.1 is somewhat broken. For example pipelining and keeping connection open, data integrity issues like no content length followed by unexpected connection

HTTP 1.1 is somewhat broken. For example pipelining and keeping connection open, data integrity issues like no content length followed by unexpected connection loss, etc. It also allows ISP shenanigans like content modification to add unwanted advertising and unlimited tracking, even spying. So could you please explain your reasoning?