As I said, obviously we have different opinions. Even when you factor the expectations. When yours are winning the league, coming 2nd, 4th of 8th is same in my books. You came short. Whether is 1 point, GD of 30 points you don't get a trophy for that (although in future you never know). You build experience, learn from your mistakes now and take it to improve in the future.
I'd take a cup win compared to couple of places higher in the league.
Obviously if you are Brighton and you finish 2nd considering you never witnessed winning the league ever it might be considered great success and better than if you win the League cup and finish 4th for example but for United? Naa.
Yes, it's all about opinions at the end of the day.
I do like the FA Cup and am glad we won it, it's put a smile on my face. I guess I see memories of a happy moment as being different than cold hard analysis of which was actually better, even if the memories of a cup win do last longer. It also does depend on the club.
It's sad, and I'm spoiled, but at the same time I know that because of the stature of our club, and the financial advantage we have over many others that our real goals are to win the Premier League and to compete well in the Champions League in the not too distant future. Coming 8th and winning the FA Cup doesn't build towards that at all. Coming a close 2nd, playing well most weeks and winning nothing does for Arsenal who have similar aims. They can now attract better players who want to play in the CL or believe that they have a good chance of winning the league the following season. They have a bit more money through future CL prize money, can likely get higher sponsorships etc. and can improve the team more to possibly help them get over the line.
For the bolded (Brighton), any cup win would be amazing for them. They've never seen their team win trophies of that magnitude and can't realistically hope to be one of the biggest teams around for a sustained period with a chance of picking up even bigger ones. Even if they came 2nd it would only be once as they'd have all their players picked off by richer clubs. It's sad that they can't aspire to greatness and it's sad that I feel we should be up there regularly if we get things right rather than everything being more open when it comes to competition. It is how football has gone when it comes to money and expectation though.
If I'm them I'd give everything for a day out at Wembley and a League Cup or FA Cup win, including relegation just like Wigan did. Our season can reasonably be seen as a failure, but it's almost the best a club like Brigton could hope for. I wish it wasn't like this, nor the way it is when comparing us with Arsenal but it's the reality of modern football finances and I can't escape it.
Before the existence of the Champions League and all the cash it provides I'd have said we had a better season than Arsenal. It would be UEFA Cup qualification for them, Cup winner's Cup for us and an actual trophy. Easily us, and the gap to bridge for us to hopefully win the title one day wouldn't feel as big as things were very different. I think it's awful the way things have gone.