I really dislike the new Purple Dragon Knight

How dare they change the most beloved subclass of 5E? They made them dragon riders, can you believe that, who would want that? Don't they know that the REAL Purple Dragon Knights are named after the ancient black dragon Thauglorimorgorus slain by King Azoun Oberysk I ? (not to be confused with King Azoun Oberysk IV, who was slain by the ancient red dragon Nalavararauthatoryl). Thauriglorimorgorus was so black he looked purple, and that's how the Knights got their name. It's the LORE, they never rode dragons, and so they never should. The lore clearly intends them to be able to sometimes heal both themselves and maybe one or two of their allies within a certain specific distance, for a few hit points.