I'd suggest if you're only playing one match a day, you have less data than those of us that play far more than that, and can get a better feel for game texture with and without premades. I share your frustration with people who don't try, but would argue they have been "beaten into" that despondency, to use Olivia's charming terms, by the oppressive presence of premades.
That isn't pure speculation, incidentally, you see that precise reason given in chat.