A "cartoon" is no different the any other vehicle for delivering a story. Labelling something as "tacky and juvenile" just because it is in the medium of animation is just... incorrect.
As to wanting "this type of content", what I absolutely adore about Harley Quinn is how much love and knowledge it shows for the characters. From their well known character traits, to the memes and discourse around the characters. It understands them and uses theses great characters to tell awesome stories, that makes me laugh and smile constantly.
My favorite thing about this whole situation, is the person who decided to tell the showrunners that heroes don't go down, has now made it a part of Batman lore. It is now a part of the discourse of the character. Congrats.