so is matchmaking just random?

https://gyazo.com/aa0c0cc840b8c2acf9a2e70f1b5da2ac

im 4-2-1 100% contribution everyone else is 0-5 1-4. Like im genuinely confused after my 6 years of playing this game how its this bad all the time. Ive played with bronze players better than my current team and I cant even flame them because its riots fault not theirs rofl.

Edit: results of the game https://gyazo.com/097de3725635b64870c7b629b4fa7770

Clearly unfair and the one time I didnt flame my team its really not their faults. Usually im the one to get pissed but like damn riot.