Oh shit, looks like Elon got to go to the mall to “train” with the swords at gamestop, and now he’s all cocky.

First rule of PETG-club is “dry your filament”, second rule of PETG-club is “dry your filament”… Thrid rule? Nope, it’s “store your filament dry”

Jokes aside, other things you could look at:

• nozzle, how worn is it?
• calibration tests: did you do a temp tower? Calibration cube? Retraction test?
• The vertical surface doesn’t necessarily have that appearance as a result of wet filament. In my experience, wet PETG will result in more random variations than that. It looks too regular IMHO, is everything that should be tightened actually tightened?
• have you calibrated the extruder steps?