Some might hate it but here is a little bit of truth about the Irishman, against the 8s and the 9s and the 10s:
It is a "Too long didn't read" kind of movie.
What is the reason of this enormous more-than-three-hours runtime? Probably to enjoy as much as possible Pesci, Pacino and De Niro working together.
But folks, this time has come and gone...
Goodfellas, Casino etc. and anything Scorcese did is amazing.
But getting mob-type genre back in play in 2020 needs a bit of a twist and taste for the different audiences. 3' 24" is outrageously long and slow even for the fanatics.
I watched it on Netflix and it took 2 days to go through the movie.
Very slow character development, which is absolutely not necessary, as we as audiences are already trained in this genre.
If you don't like this mob-type genre and these actors, there is almost no chance you would watch this movie or you 'd drop it after half an hour.
Only plus is the good acting of course and the great directing but...if you are new to this genre, start from the classics!