Theory behind lose streaks?

now don't say I'm on tilt now don't say it's always my fault... its only sometimes my fault (lol) now.. I'm not saying.. I'm better than my team.. oh dear no

"what the fuck are you saying m8?" I would say all these losses are exhausting but I slept till the afternoon ffs yes I took a break, went to sleep, had some tea, came back to league.. annnnnnnd we're stil losing alright so it's definitely not me being on tilt

what exactly is the theory behind why lose streaks happen... is it purely luck? cuz of tilt? well in this twisted casino, the dealer is riot's match making systems, which we know is not entirely random so it's not luck either? after all the dealer is looking through all the cards before handing it to you... I've had these... crazy conspiracy theories for awhile now that Riot systems use underhanded tricks to ensure you that you will always drop back down to 50% win rate the problem is the enemy team is flat out better than all of us (okay so maybe that's a lie) well that doesnt seem fair, I wanted to be matched against better players... but I also want the.. matched up with equally competent team mates (wtf why do they have plats and i got bronze)

tl;dr wai is dis happening to me D;