You must have had the most casual of casual stores.. drawing to split 1st and 2nd is common practice at every place ive ever been. Most stores use a prize support that makes the difference betwen 2nd and 4th too big to not do it. Its basic game theory, like the prisoner's dilemma. If its something like 12, 10, 8, 8 packs for 1st-4th. You can both draw to guarantee 11 packs (splitting 1st and 2nd). Or, play to get 12 if you win, or 8 if you lose. On average, you lose a few packs playing it out. The same thing happens in 90% of draft pods on mtgo.
You made it sound like they were drawing EVERY time they played each other, even in round 1.
If there were complaints about them, im guessing its cause they were just dicks. If it was literally just that they were winning all the time.. then everyone was being whiny bitches, sorry. You are paying to enter a tournament with prize support. If you want to bring your pile of jank and expect to win, you are delusional. Play for fun, play commander, whatever. A tournament is intended to be a competitive event, even FNM. That isnt a 'grinder' mentality, thats just being a spike.