Some of the most legendary strains of all time came from Mexico. Acapulco Gold, Oaxaca, Guerrero… The reason brick weed hasn’t changed in the thirty years you’ve been smoking is because it’s just that: brick weed. No matter what genetics a grower starts with, if it’s processed the way brick weed is processed, it’s gonna suck.
You can thank the cocaine trade for the disappearance of pretty much any good imported weed. And I don’t blame them. “Let’s see… I can sell a kilo of weed wholesale for $500 or a kilo of cocaine for $50,000… Hmm, which should I do…?” Take into account that a ton of cocaine is probably one-tenth the size of a ton of weed, which means importing it is not only easier, but requires less gas, more can be shipped at once etc etc and it only makes sense that dealers would opt to deal with blow instead of weed.