This is the second season in a row that's failed to materialise. A lot of people seem to have banished the fact that he was shite in the second half of his debut season from their memory, but I certainly still remember the excuses about him being "tired" and how it wasn't his fault because the entire team was struggling and that he'd be back with a vengeance after the summer break. Then last season happened. He's been awful for a solid 18 months. At some point you have to accept that this is just his level now, and that signing a 30 year old Real Madrid cast-off on astronomical wages has been a disaster.
Regarding that first season, he was the fifth most dribbled-past player in the PL (50 times). Also, keep in mind, that the players ranked 1-4 played between 700–1000 more minutes than Casemiro. So, on average, he was the most "dribbled-past" player in the PL. And that was his good season when no one was moaning about the tactics yet. Last season, he was dribbled-past 52 times playing - give or take a few - the same minutes. He's been rather consistent during his United career... Consistently bad, that is.
You can make (some) excuses for (someone like) Alexis Mac Allister, who topped that particular start last season (63 times). Much younger and inexperienced at this level of football, his team in rebuilding mode with plenty of hiccups in its performances etc. Above all, being asked to perform a demanding role he's not exactly familiar with. Casemiro can only claim the "playing in a bad team" excuse. And not so much for ETH's first season because, after the shocking start to our 22-23 campaign, we went back to "known and familiar" tactics for the most part. Is the role of the holding midfielder in ETH's head too demanding even for the absolute best? Yes, it is. But the distance, from this admission to the shitshow he's been serving up week after week, is too vast. United paid a premium fee and are paying premium wages, too, and what we get in return are bad decision-making, awful reading of the game and mistakes galore.
Here's another interesting bit about the "dribbled past" stat and midfield options. You will struggle to find two "top-half of the table" sides with two midfielders (defensive or attacking) who got dribbled 50+ times. During the previous four seasons, United were one. Before Casemiro, in the defensive midfielder role, it was Fred. I believe most of the Caf can guess who their (constant) partner in crime is. But, yeah, all we need is to switch to 433.