Think you'll find Alf Ramsey came in for pretty much constant criticism from fans and pundits. Obviously it abated for a while after 1966, but by 1970 he was the hapless whipping boy for everyone's disappointment again.
It really is a no win job, especially when supporters hold the England manager responsible when clubs won't cooperate.
That is true, but then I used to wonder why he did get moaned at. He was extremely successful. The moans only started when England failed to qualify for tournaments, which was the 10 year period from after the 1970 World Cup to before the 1980 Euro Championship, when Ron Greenwood was manager. That was the era when Brian Clough was first put forward as a potential England manager. Instead of ignoring him totally they should have gone on bended knees pleading.for him to do the job. Then England's success rate, player and supporter attitude might have changed for the better.