Animated Texture Quality Terrible

I'm trying to create a short opener for a clip by using a plane and an animated texture. I created the animated texture sheet, frame by frame, in photoshop. It's a large texture, 12x12 frames. When I try playing it in unity, while it works, it is of a significantly lower quality.

I have seen posts about tweaking my import settings, but these are the only ones I see (no max size etc)

I did have to use an older version of unity to make it work with the rest of the project I was working on - is that the problem? I feel like even older versions should be capable of generating good quality