Bloom and anti-aliasing can be changed in AOE 1 DE and so can probably be changed in AOE 2 DE Age of Empires 2: DE Spreadsheet with an extended version of the Q&A
Cysion confirms that shaders can be toggled off, so can alter look of graphics if those do not suit https://www.reddit.com/r/aoe2/comments/bzo16c/exclusive_screenshot_of_age_of_empires_ii/eqx5kjl/