I managed to get a few wins to get my Radiant back and lost it on my first game because of a drunk Spanish guy shit talking every round and a lack of comm/skill. My question is WHY is it possible to derank on first loss after reaching a hig...

Hi guys, I'm new to the game and the picture below shows my first game ever. I have some background in playing CSGO so I got lucky with some kills. I don't understand why I got matched with Plat and Diamond players. I obviously did bad and...