Yeah, the Descendents have always been ass-kicking through and through- it's just that perfect mix between aggressive (yet catchy) music with Milo's raunchy voice just boosting things and literally pushing them one step forward. On the other hand, Descendents have become sonically better with age- It's no wonder my fave outputs are Everything Sux, Hypercaffium Spazzinate, Cool to be you and 'Merican just to name a few. Again- this has nothing to do with songwriting.
When you think about all, I can def spot on big flaw- they were never able to find someone nearly as good as Milo. Had vocal lines been less smooth on their records, they would have certainly able to win more approval among punk rock fans- be them returning Descendents fans or just a plain new fanbase. However, albums like Mass Nerder, Allroy's revenge, Allroy Sez and Allroy Saves are top tier material (especially the very first title on top of the list)