RoyalBlue
What do you classify as 'modern'?
I don't recall things changing that much over the last few decades! - well apart from the far greater percentage of disposable income that supporters are now expected to pay to watch football. If things have changed and supporters are more impatient for success then maybe that's the reason.
fans have always moaned about ticket prices. I remember the sharp intakes of breath when upon promotion in 1986, fans noticed it now cost £3 to get in. I remember our first away match at Barnsley back in the second tier in 1994, when fans were outraged at having to pay £12 to get in, to the extent that they spent much of the game giving the Barnsley board stick about their prices.
Part you can blame on the media attitude of total impatience aimed at the England manager over the years. Add in phone in shows which rely on perspective-free fans ringing in to state the manager has "lost the plot" at every opportunity. You could even add message boards, as they tend to be be an outlet for those with the extremes of opinion. Hardly anyone who is "slightly disappointed" tends to start a thread.
You can also chip in the way society has changed, with people demanding instant success and gratification far more than before, and typically feeling that they are entitled to it. Fans, even at Reading, now think they are entitled to premier league football, and that football lower than that is unacceptable.
Add to that the way the premiership has gone, with a number of deep-pocketed chairman spending huge sums on their playthings. The truth is that typically all chairman have put in more than they've taken out, but historically that tended to be an unintended consequence, as was the case with Madejski's earlier years. Too many fans now seem to think any chairman who doesn't pump in millions to buy success is a bad chairman.
It all adds up to fans becoming impatient far quicker, but because of things like the internet, the extreme views are much more visible and make much more noise.