With Disney+’s Daredevil: Born Again bringing back Charlie Cox and his Netflix co-stars for a new series—following Cox’s Matt Murdock reprise on She-Hulk: Attorney at Law—the question’s come back around again. In an interview with ScreenRant, Marvel Television’s Brad Winderbaum was asked about the canon status of two of the ABC series: SHIELD and Agent Carter.
It kinda sounds like how the comics work. Sometimes there are inconsistencies. Whatever you’re reading is the most canon, and everything else is secondary, but still canon. It’s fun to square them with each other, but ultimately they are both canon.
Also, AOS left a lot of stuff vague intentionally so they could be retconned. For example, they reference an event which is obviously supposed to be the black order landing in NYC, but that completely messes up the timeline. But they don’t directly say what it is, so if you ignore what it’s implied as, then it’s fine.