Other people have weighed in on your post in Gameplay, so I'm going to try to cover as much as I can from it as well as here. Starting with this;
every no vote is literally someone who wants to troll and enjoys ruining other peoples games so if every time they have to make a new account they had to do this it would be an issue.
That's called an ad-hominem attack. You're claiming that the people who disagree with you, for one reason or another, are all trolls. If that's how you respond to criticism and disagreement, then your argument is hardly worth considering. Bear that in mind for future discussions, because I'm only going to personally give you benefit of the doubt once.
please make it so in order to play a champion in ranked you must have a minimum mastery with that champion and your over all mastery score. for example if the minimum mastery requirement per champion is rank 5 (the highest rank you get for just playing enough games to earn the mastery points regardless of how good you are). then you should have to have a minimum of 20 champions to play ranked which would also require a minimum mastery score of the equivalent (20 champions x level 5 mastery rank).
You're far from the first person to suggest placing a Mastery Restriction on Ranked - but you're certainly the first I've seen to off-handedly bring up the first problem with the idea of a Mastery Restriction.
Mastery != skill. Higher mastery does not equate to higher overall skill with the Champion, especially if our supposed cap is MR5 - all that means is that you played that Champion a lot. It doesn't mean you understand their kit, and it doesn't mean you're good at them - it doesn't factor in whether you've been carried or been doing the carrying, or if you have any real understanding of how they play.
Of course, there is the general understanding that, the more you play something, the better you understand how it works, but there's also a point to be made of general game knowledge trumping per-Champion skill. I, personally, am pretty adept at the game overall, and have hardly any difficulty picking up a new Champion.
Another issue with a Mastery Restriction would come as a side-effect of what you've also already pointed out, which is the need to have 20 Champions at MR5 to play Ranked.
What happens when I get Autofilled Support, but all 20 of my MR5 Champions are top/mid-laners? What if I just so happen to have no Champions who can feasibly be played Support? Do I just have to bullshit it, or pray that someone's willing to swap roles with me?
after that simple addition to the ranked ladder it would also solve the issue for when new champions come out since you will now have to lvl up to rank 5 mastery and by then they should ether be balance or you should at least know the basics.
Okay, well, that solves the hypothetical problem for new Champions, but what about VGU's? What if I'm Mastery Rank 5 on a Champion, and they get a VGU which fundamentally changes their kit and playstyle, like what they did with Galio? I'm still MR5 on the Champion, but I'm gonna have to acclimate to the new kit - so if new Champions are a problem, then you also have to consider VGUs a problem, too.
being lvl 30 and then joing your first ranked game were they place you in silver or higher elo is wrong. why is iron there if everyone who should be in that elo is just placed above it, so they drag people down with them.
Players are placed more-or-less at a fair starting point so that their skill can dictate whether they climb or fall. It's like Honor - all accounts start off at Honor Level 2, despite 1 and 0 being a thing. Silver is just the Ranked "baseline", and players who don't play well will simply fall to Bronze and then to Iron, whereas people who play well will climb out of Silver anon.
Bonus points; do you really expect someone to get to Mastery Rank 5 on 20 Champions by Level 30?
if these steps that are described in the linked post are implemented it would raise the fear of being perma banned 10 fold which i believe is beneficial to both high and low rank players.
Your suggestions in the other post wouldn't increase the fear of being permanently banned, it would just aggravate players who want to play Ranked but have to deal with pointless, arbitrary restrictions.
The rest of your post here seems to just be ranting about low-elo matches and being unable to carry matches; to which I can only say, practice. If you want to get good enough to carry matches and climb? Improve yourself. But the majority of this post has little to do with the suggestions from your other post.
Some additional stray thoughts;
Mastery Restrictions ignore the possibility that players can be good at the game overall (as mentioned before), and also ignores that players who have high Mastery on a Champion may just have gotten lucky with them a few times - that's certainly the case for me with Azir, whom I have at Mastery Rank 7, but cannot play for my life.
They also needlessly punish One-Trick Ponies, which, while it's generally favorable to have more than just one Champion you can play well in case your favorite gets banned, One-Tricking is still a viable playstyle, and I'm certain more than a few would be grievously inconvenienced by your suggestion.
Your problem with "New Champions" also can be called into question due to the existence of the Public Beta Environment; New Champions and VGUs virtually always get a month of playtesting time on the PBE, and there are doubtless people who are fresh mains of the Champion (for whatever reason attracted them to them in the PBE) who would also be inconvenienced by an arbitrary Mastery Restriction.
