Rawkus said FURIA paused the game, TenZ clarified that RIOT was the one who actually paused, because of a jump people are making with every agent since the begining of the game. Basically RIOT paused the game for 15 minutes without a valid reason, that pause helped SEN gather their thoughts and get beck to the game, while stopping FURIA's momentum and ending up with FURIA's defeat. So RIOT basically helped SEN win, they were favored by the organizers.
What really pissed the BR fanbase so much is that they made that banter on twitter after literally being favored by the organizers. FURIA was just robbed by riot and we still had to take that shit from SEN? That was unaccaptable and a very good reason to get enraged.