Canonical has been taking bad decisions for quite some time now, and this developer was trying to reach Ubuntu users even while probably knowing these. Which makes sense, of course. The point being that this dev's disappointment seems quite specific in these notes (against Snap), and imho he might work again towards shipping their app through Snap if he was allowed to. My comment compares Canonical to Apple, to give some context of where Canonical is at so many other idiosyncrasies (for example, I also heard other bad stuff about their H.R., in particular a way too lengthy hiring process.)
My take would be take a PNG image and convert to ANSI. So for example you can use an AI to get a PNG, then you can posterize in Gimp if needed, and finally run something like ansilove.org but there are plenty of tools, just search image2ascii or similar. Good luck. Have fun!