For context i bought my iphone 13 pro from this store and also bought screen protectors from there in the past as well as a case. He charges 10 euro for a screen protector which i viewed as expensive. So after about 3 screen protectors i got fed up with paying 10 euro for a screen protector that probably costs him under 1 euro so i bought a 4 pack of screen protectors from aliexpress for around 2.50 euro. I politely asked him to install one of these screen protectors i provided for me and it apparently left an air bubble at one if the corners this trend continued for the other screen protectors as well as i provided all 4 in hopes of getting one to seat properly. Spoiler alert none of them did so i was defeated and had to buy one of his screen protectors. However i noticed that when he was applying his screen protector he took extra steps like cleaning the phone surface and using some sort of sticker to pick up any dust. I noticed he was also very gentle with applying it. All of this lead me to believe that he purposefully ruined all of my 4 screen protectors so id end up buying his. Do you guys think he ruined them or are aliexpress screen protectors actually bad?