Yeah, and some of the cartels have also been run by ex US special forces operators.

These groups are not just some homegrown militias - although it's also important to recognize that they are not altogether opposed to supporting local communities when they aren't at war with the government (e.g., during covid).

It's not a simple situation, and there's no simple domestic solution. Thinking Mexico can gun them down is irrational, or naive at best.