The audacity of regular ex’s in lucky packs

I know this is a common complaint, and yes I’m bitter, but it’s truly maddening. I deleted the app because my last 7 lucky packs have only had regular ex’s. How does TCGP benefit from this? Does it actually increase user engagement? I don’t understand how players, especially those who have been with it from day one, could take this as anything but a slap in the face. Genuinely curious if anyone can explain the logic behind it.