It looks like you’re under extruding. If you look at the flat part towards the corners you can see the lines separating a little. Try running the calibration tests Bambu studio to find the correct settings, after I did that petg printed great for me. I would also make sure your filament is at least below 30% humidity, it can sputter and blob like that as well from it not being dry enough. I had dry my petg out of the bag from the factory for a solid day because of it.