Really? Well then why does everyone talk about the last decade as one of abject failure, decay and pain? We won five trophies during that span. Looking back, nobody seems to care much. We won the FA cup under LVG, then fired him and not many people think that was wrong. We won a Carabao and a EL under Mourinho, which doesn't prevent his reign from being widely regarded as a period where the club seriously lost its way. We won a Carabao and an FA Cup under EtH, which was great fun, but is anyone going to remember his period as anything other than a horrible failure?
If that decade had instead seen us consistently challenging for a PL title as closely as Arsenal has been doing for the past 3 seasons, do you think we'd be as negatively regarded as we are now? For my part, I'd trade all of those 5 trophies for just 3 or 4 seasons of being real title challengers.