Try with Generic PETG settings. That should be better (note the big differences in the material settings, especially cooling). Oh, and make sure the spool is dry. Especially (!) if it is a new spool.
Just in case: This thread helped me when first getting to grips with the Bambu PETG: [SOLVED] Bad quality when printing PETG - Bambu Lab X1 Series - Bambu Lab Community Forum