Sorry to hear about the long dry spell, and lack of luck on ascension mats. You’ve certainly done nothing wrong, it just happens sometimes — pretty often, in fact, if you search the forum.
You mentioned chests, movie (Mystic Vision), titans, and War, so I’ll just add the reminder to make sure you’re doing Rare Quests and Challenge Events, the only places you can routinely get guaranteed ascension mats, presuming you can beat the stages.
@General_Confusion put together a nice guide of all the places you can get ascension mats:
And coincidentally, @Hcmitchellr started a nice thread today on what to prioritize when you’re lacking ascension mats:
