CHANGING MY AIR PURIFIER FILTER😷

So i live with central air, if you have it you know that you have to change the filters often. They always look worse than what you see here. This is me changing my air purifier to show the central air filters don’t catch everything.
I have allergies, as well as my dog. Is this not wild?! The purifier filter is changed every 3 months.
I paid 40ish dollars for this, & filters I receive auto shipments of, the price changes depending on which filter you want and if you buy 1 pack or 2 pack.