While I've never been punished, I see many here fall into punishment cos they don't know how the system works.
First thing you need to know, the system punishes based on consistency x severity. Meaning you can be punished for 1 game of severe toxicity or many many games of mild toxicity.
There's also no need to ask for reports. 1 Report does the same thing as 9 reports, and all a report does is to flag the system to check for toxicity. If no toxicity was found, then the system will "throw away" the report. If there was toxicity, then the system will grade the severity of the toxicity, and the toxicity score will be accumulated into your account. This also means that it is not necessary to "defend" against people whom threaten to report you. Nothing will happen if you didn't do anything wrong.
Finally, not everyone is trolling/inting/griefing in your games. People have difference strengths. Some might have a strong laning phase, but terrible macro in late game. Some might be all mechanics no brain (looking at those Yasuo players). Some might be tilted off the face of the earth from their last game and super tunneled on that little minion (and failing to last hit it). There will be bad players in your game, but just because they are bad, doesn't mean they are purposefully sabotaging your games. It's OK, there world isn't going to end when you lose a few games.
Remember, You'll get to your proper rank with many games played, and you'll get to your deserved rank (not to be confused with your desired rank) by the end of the season. If you are "hard stuck", then you'll have to git gud, and there are plenty of good guides out there to help you improve.