I really don't understand dynamic q and matchmaking.

I didn't play ranked for 6 months, but I started last week again. From plat 4 got to plat 1 80 lp and now I'm only losing and after 6 games loss streak, I got matched against 5 man premade (I asked them) with all solo's on my team, maybe my bot lane was premade. I don't have to tell you they were going everywhere as 4 almost all the time and could coordinate ganks and taking objectives. Now, I don't understand what should I do when after 6 games of 0/10 adc's and "idc anymore" players, I get matched against a 5 man premade and of course I get smashed, when I play only solo. I'm just stunned at this system and I really don't get how a billionaire company can remain oblivious to this and throw some 50% win rate statistics at me when I won't give a fuck, unless I can play solo vs. other people that play solo. It's really not that hard to understand. I have a solo badge and the fuck does that do ? Legit nothing if I have to constantly play against premades that fuck up mmr and the games are just not enjoyable on the winning or losing side if you're playing solo. I'm not even mad anymore, I'm just disappointed at riot and how they shove dynamic q on solo players. There would be feeders on pure solo q too, but at least I'll know we're on the same playing field, not on some weird fucking combination of mmr because premades fuck it up.