Like from same artist? I havent seen much drastic downgrades. I hated the artsyle after love is fantasy the queen then sidestories for love is an illusion. It made everyone “twinkified” even the male alphas. Tho it became okay in LIAI superstar.
Another is dear benj. Tho it was different artist cos the og was fired. Its not much of the art was really ugly, but the style was drastically different that it felt uncanny
The only one I can think off is half of me.
I have an example of the MC in my albums.
The first picture shows the beginning art, middle picture whatever was going on during that time
And finally the last image is the current style.
(The art has gotten better again, though)
https://www.mangago.zone/home/album/517554/
For me it was this one:
https://www.mangago.zone/read-manga/i_m_the_villain_s_constellation_but_i_m_broke/
I don’t even know happened to it it was js so sudden ╥﹏╥

I’m curious do folks have any best before and after pictures with manwhas that baited you with pretty art, and then you come back and your like wtf is this
Art Downgrades really hurt my feelings when I’m into a story so, I’d like to laugh about it