On this image urxvt is opaque and the antialiasing is properly set so everything is ok.

Xft:antialiasing "true"
URxvt.transparent "false" https://icosahedron.website/media/cOgdc2IYqbBxom_Simg

1. you can see that, on the first image, urxvt is transparent, which may render text difficult to read: the "URxvt.transparent" bool is set to "true", while it should be set to "false";

2. on the second image, not only is the tty transparent, it also has antialasing disabled; and

3. on the third image, while the tty emulator is opaque, the antialiasing is disabled: the "Xft.antialiasing" bool should be set to "true".