You are correct of course.
I meant someone who joins the league is 1500, before finishing a game and therefore on paper better than average.
But most people seem to start with losses. I could get the correct data for that (and might find out that I am wrong with that hypothesis) but frankly am too lazy so a rough estimate is looking at people who currently have exactly very few games finished.
Out of 37 players who have completed a single game, only 8 have won that single game while 29 have lost it.
Out of 16 players who have completed exactly two games, NONE has won both and only 6 of them went 1-1 while 10 have 0-2.
Out of 20 players who have completed exactly three games, two have won all 3, 6 players have won 2 out of 3, 4 went 1-2 and 8 out of 15 went 0-3
So we have 71 players with 1-3 completed games and only 14 out of 71 have a rating of 1500 or higher.
I suppose it’s safe to say that new players tend to be worse than average - which shouldn’t be surprising.