Simply have a basic expectation of how the teams should play and call out poor passes, control and movement. Players and teams don't like to be derided for their lack of quality but when they are getting praised for some shoddy performances or basic but flashy skills nothing is going to improve.
Listen to La Liga, Seria A and Bundisliga fans when they watch games they are all about the details which I rarely hear from Prem fans, post game analysis is also far better and the teams from those leagues show a much higher level of skill even though most of the players in the Prem are better players. Most prem fans can't even read off ball play or formations or the role of players in said formations so it is a big ask.
People are guided by the punditry too, which is quite annoying. It means you get opinions being regurgitated with no thought as to whether its correct or why.
Two particularly annoying ones were how everyone hates zonal marking, and will lay into it at the first chance they get, and also squad rotation (although people accept that now, but 15 years ago wasn't)
I used to argue with other Liverpool fans at my old job quite a lot who would lay into Rafa for zonal marking especially - but their point would never really move beyond "its just bad".
I also think in this country a lot of the time pundits focus on the result and then work backwards, instead of looking at how the teams actually played. There have definitely been a few big Liverpool wins over the years where they haven't actually been that great, but had pundits drooling, and a few losses where it actually wasn't that bad, and the pundits lay into whatever scapegoat they can latch onto at the time - whether thats lack of a bench/zonal marking/over reliance on 1 or 2 players etc etc