Ryan and Duran, as of right now, have the top bWAR among starters and relievers, respectively, among AL All-Star snubs.
Ryan was partly a victim of the selection process, a strong group of player-elected starters, and the fact that at least two of the Commissioner's Office slots were used to comply with the everyone-gets-a-guy rule (you could argue a third, but the Royals also got a Commish pick for a position player). That means it was basically three of Ryan, Kris Bubic, and Bryan Woo for two spots. I'd have gone with Ryan over Woo, but it's not the most egregious snub of all time. At least they didn't burn a commish pick on a reliever.
As for Duran, they could've drawn the top four relievers out of a hat for the three spots. Duran is worthy, but so are Chapman, Munoz, and Hader.
So nothing terribly out of line, but they just got the short end of the stick. That tends to happen when your team as a whole disappoints