As someone who watched City in the 70s (and loved it) some of these TV repeats have been an eye opener. It certainly shatters some myths about so-called great sides of the past. It's like watching walking football and most of the defenders just look like unfit, slow, cloggers. It's no surprise that English international football was a joke for most of the 70s and 80s (post 1970)
There were great individual players of course who, with modern fitness levels, would have been great in any era but you just can't compare 40 years ago with the modern game. There's lots of things I hate about the modern game...but it's not the quality on the pitch.