Hi i can tell you it's not no 2 - 3 or 4, the second one is terrible, do you try to change extrusion setting?
i use a Prusa MK2S and i never seen something like that. The PETG is the easiest material to print

This is a riser for the common Rosewill/Best/Flexzion/Yobo food dehydrators

https://www.thingiverse.com/thing:2669646