PETG really is variable from suppliers. It ranges from easy as PLA to unprintable.

There are reasons why they don’t make these out of plastic.

Skip the glue. I’ve found it’s just gunk that separates the filament from the print bed, worsening adhesion in my testing. Clean your print bed with rubbing alcohol before hand.

99% of printing issues with PLA are solved with a thin film of glue stick.

IPA does not remove oils, it solubilizes them and then they deposit back down again when it evaporates. Soap and water is better because it removes oils and plasticizers.

If you are genuine and trustworthy, you will never get a printer to review