I'm not DSC's biggest fan but his argument is more tiresome than a marathon of a Trek series' worst episodes. I mean, don't watch if you don't like it.
I have many things I don't like about DSC but I still like it a lot more than I don't and give the show a chance, enjoying most episodes to one degree or another. "This Ruins Canon" isn't an argument and I'm the pedantic nerd who cringes about the Klingon makeup change with no in-universe explanation from the producers.
Anyone can hate anything for any reason but if they want me to take their complaints seriously and agree with them those reasons had better be good.
The whole canon argument bugs me. I don't expect every writer to get every little tidbit or throwaway line ever spoken, just the broader strokes. I thought it was a mistake to stick Discovery in the original era they did because it was going to bump up against the established timeline when you literally could stick it anywhere else in time, but I wasn't going to hate it because the ship might look more advanced. I am perfectly fine with the real world explanation that TOS was made with no money and the series and movies that followed were made with money and advancing technology, whether that comes to the Discovery having touch screen controls or the Klingons having ridges.
I don't think it's the best written series, but I bet I can cherrypick other episodes from earlier series that are far worse. The Alternative Factor, Code of Honor, Move Along Home, countless Voyager episodes, A Night In Sickbay. The show has had several show runners if I'm not mistaken, which doesn't help keep a straight course for the writers to follow.