I’ll go with Filoni just trying to remind everyone Ahsoka’s importance in Star Wars, to promote his Ahsoka show. Despite 30+ years passing, and many other stories in and events in her life, since Ahsoka was trained by Anakin for those 2 and half years.

(was it only 2 and a half years? it seems longer).

Edit: It was also Anakin’s selfishness, greed, and lust for more, that led him to the path of eventually joining the dark side.

Even George Lucas states this on many occasions. Just a few examples:

https://gffa.tumblr.com/post/163372848020/george-lucas-2010-at-the-clone-wars-writers
https://writerbuddha.tumblr.com/post/652270734706688000/george-lucas-on-attachment-from-1999-to-2021
https://twitter.com/AllThingsJedi/status/1506335678971453444
http://eleven-thirtyeight.com/2017/04/selfish-love-why-the-jedi-were-right-about-attachment
https://www.youtube.com/watch?v=kNV0VVFcDkQ

Anakin was indeed an awful Jedi.