Let me break it down for you since you, again, don't know how the system works at all.
A) W/L ratio is arbitrary. Its basically just a stat to look good. It means very little in MOBAs. I've held slightly above 50% (meaning even as low as 50.1%) and I made it out of bronze in my first 2 season of play and this season I seeded gold after ending pre-season in Plat.
B) Winning against people who are bad doesn't prove anything. Think of it this way. Tom Brady can go play on a high school team and do amazing. Does it really prove he is good? Thats what this is similar to. You are an above average bad player so beating really bad players means nothing. It proves nothing when this system isn't based around your W/L
C)Thats a delusion since you believe yourself to actually be much higher than you are. In reality you are no better than your opponents.
The MMR system works the way it should. Beating someone with a lower MMR proves nothing. Refer to B for this one. Thats where you are at. The same time Losing to them speaks more to where you are than winning. The system is telling you that your MMR is not where you are and that is why you are stuck with who you are. Ultimately you suck, yea thats blunt but its true. You have tons of things to work on and to actually get better at. If you don't want to put in the time then don't, but don't come here complaining about whats fair and whats not when you don't want to put in the time, but want to be better.
I've been on both the wrong and right side of those streaks. Went from Bronze 2 to Bronze 5 when i first played in season 3. Ended that season in s4 and by preseason made it up to s2. Next season I seeded b1 and made it out in about 10 matches or so. Ended the season G4 and on a streak I made it all the way to promos for plat 4 before it ended. They fluctuate because you let them. Losing to much is a sign you should stop and not continue playing. If you continue to play on a losing streak thats your own issue not the systems.
Actually the MMR system makes it easier to be where you belong. If you want it easier to end bad streaks then good streaks will also be hit and be much less beneficial you can't have one without the other. Right now the system rewards giant win streaks much more heavily than giant losing streaks. If you would like it to soften both you won't be gaining as much anyway even though you'll lose less. Either way you are stuck.
I would love to see a stat where your team got 70% of the afk in 100 games. Even when I was in bronze AFK's where not common. They were more common than when i moved up, but not like you make it out to be.
I don't assume you are stupid. Your own words tell me that you don't understand something and yet you continue to voice your opinion on it. IF you can't understand something then you have no place in speaking on the subject. Thats just common sense. You provide no evidence or help when you understand nothing at all and will only hinder the real work to getting to a true solution.