>>58168016
>Do I need to win or can I just spam matches?
You could lose every match but that would give you a very small amount of stardust, around like 600 (better than nothing I guess). Best you can do is tank (picrel): You get to level 20 in just 6 days and remain there enjoying the dust, candies and the occasional legendary. After you follow picrel and get to level 20, you should do 4-1/0-5/4-1/0-5 /4-1, as in win 4 out of the 5 games the first match, then lose every battle the second, win 4 out of the 5 games the third, and so on. This way you stay in the relatively same ELO and enjoy.