There is nothing undeserved about Feyenoord's qualification: they became Eredivisie champion.FR-Rinaldo wrote: What was undeserved about the qualification of Feyenoord for a direct Champions League Group Stage spot? Feyenoord isn't the only one that underperformed a couple of seasons. I remember a PSV finishing third in an Europa League group with the "mighty" Odessa and Ludogorets in 2013 and Ajax finishing third in an Europa League group in 2015 with the "mighty" Molde winning that group.
If you want to compare Feyenoord to Ajax and PSV concerning UEFA performance, don't use worsted performance to prove a point. Take for let's say UEFA performance of the last 20 years and see that Feyenoord's contributing to Dutch UEFA success is much less significant than that of Ajax and PSV (and even Twente and AZ, I think).