Not that it was clearly telling that 100% before but it was a little more accurate.
It cannot accurately predict your skill level, when you go solo and get premade 4 in your team. Or even premade 3.
You cannot contest that those premade 3-4 have more control over the game than you. They dictate the outcome of the game, you're pretty powerless when paired with them . So what does this tell about your skill level ? Nothing mostly .
Or you can choose to be the one in the 3-4-5 man premades, and that will tell what exactly about your skill level ? Oh right, nothing mostly.