Well, I tried to get my Battle Tree streak back up, but lost again at 70. All because a Thunderbolt paralyzed me and I couldn't move twice in a row. That's a 0.625% chance of happening.
Assuming one thunderbolt per battle and you suddenly get a 35% of this happening during these 70 matches. If it isn't thunderbolt it might be a crit, burn,... basically these things require huge amounts of luck.
Yeah, I should have specified, it's not just because an unlucky thing happened, it's because it happened at a time when I really needed it not to. I've had worse luck before and still won, the problem is getting an unlucky break when my team is already struggling.