I have $40-$80 tents and they don't have rips or holes. I have two 2x4's, a 2.3x2.3 and 3x3 and none of them have holes or rips. You have got to be the unluckiest guy in the world. Three of them are 1680d fabric as well. One of them has a pinhole or two around the bottom of the zipper where the stitching goes through the fabric. I put three 240W quantum boards facing up in every tent to check in a dark room, and there is next to nothing showing from any of them bar the 3x3 with the pinholes around the bottom of the zipper..
Pinholes don't even matter anyway. There is zero way enough photons could enter through a pinhole in such a diffuse light like a general room in the first place. There is way too much obsession with light leaks to begin with. I've grown photos in a well lit room with all three vents opened and never had any issues and I don't sleep at all two or three days of the week and have room lighting on 24/7, so why would a pinhole be expected to cause issues?
If you are actually getting tents at that price with actual rips, Id simply get a refund and try another brand instead of going through multiple. Im brutal when it comes to my money spent. i don't give second chances, if the product is faulty from day one, I get a refund and invest my money somewhere else.