Many AVRs can also adjust it so the dialogue is louder, but I haven't found a need.
And a soundbar is still way better than TV speakers.
Derry Girls is interesting in that the actresses sound mostly like trained Brits doing an Irish accent. I've never been to Ulster, I don't know how people actually talk there, maybe the Irish have a softer brogue from having to interact with the British/Protestant people they share the region with.
In any case I think my anime watching has resulted in a slight dislike for CC if only because I find it all too easy to accidentally only read, and actually the action going on. I only realized this when I go back and rewatched some old youtube clips and found myself not remembering the actual animation and physical comedy.