No, the only reason this failed was because of an extreme lack of content, the hawkeye expansions were delayed because of the delays with the show, and the war for wakanda expansion was delayed because boseman died, there were many long stretches without any meaningful updates, and they also refused to fix some glaring issues, instead opting to just release new cosmetics and introducing more stupid mechanics.
Every new roadmap talk just made it seem like there were 5 people working on the post launch content, which caused many of the promised update/content to never materialise.
If they had stuck to the strengths of the core combat system and had a steady stream of meaningful updates/content, the game would not have killed itself.