Do writers hate Hank Pym Ant-Man?

[Ultimate Captain America]

In Assemble they never really go into how Ultron was created, he just kind of shows up. But one his last lines in his last appearance him talking about how Tony created him even though it was never really brought up before that.

The show had this weird dynamic of assuming it's audience watched the movies rather than actually doing a thorough job of establishing characters, despite not being 1-for-1 set in the same universe of the movies.

Didn't Ultron appear in AA before the Age of Ultron film was released?

[PCN24454]

Didn't Ultron appear in AA before the Age of Ultron film was released?

Yeah, but including Ultron was obviously an advertisement for the AoU movie that was about to come out.

We already knew a lot of plot details from leaks.