if you win games, the games get harder. if you lose games, the games get easier. the only time this really stops is when you are either challenger near the top or bronze 5 near the bottom. nothing can really be easier than the lowest ranks since other team will make the most mistakes out of any other rank. if i played at bronze 5 at 100 mmr, i could go about every game without a death, unless i made a stupid mistake. if you can't do the same, then you 100% aren't playing perfect, let alone close to even a gold level (i say gold since i'm fairly sure most gold and up players can actually do the same).
people at bronze 5 are walking around as free kills on both sides, and if you aren't just collecting them, that means you are actually missing it. i've actually played at fairly low ranks before because that's where i started, but i focused on myself and it become easier the better i got.
i'm not saying any of this to be mean or anything, but when you say you play perfect as WW and noct, you are basically saying you are past faker level since even he isn't 100% perfect. no one is perfect and the better you play, the easier the games.
so many people have done bronze 5 climbs and just to get to bronze 5, they both would have the same teams as you and have tanked their mmr. they win about 95% of their games in bronze.
simple things you can do to climb:
position really well: this means get 0 deaths while still being in the game. while i was playing in bronze myself, i was able to go 0 deaths when going a role and champ i knew well when i really focused on it. sometimes i did die, but i had much less deaths and know the game much better now. for you, we can say 2 or less.
ward: you say your awareness is great right? so you know when to take free red and blue buffs from the other jungler when he shows up bot lane without red buff at the time his buff should be coming up. you also play perfectly enough to get every drag every time, even if you flash and smite steal it, and you can do this since you want the drag pit.
getting objectives: even if you low health, you can try to go for something when other team is ace or close to it and your awareness is good enough to know where the missing people are. kills are not the objectives, the towers, drags, baron, and inhibs are. the biggest one is the nexus.
skill shots: you either land close to 100% and dodge 100% in bronze 5, or you really need to practice this.
game knowledge: by this, i mean a bit of everything. you keep track of flash timers and ignite, and heal, and tp from the other team right? if you don't, you are making it harder than it needs to be. flash is 5 minutes so if the adc used flash at 21:24, they won't have it until 26:24. during that time, they are much more at risk. if they don't take flash, it's even easier to abuse their mistakes and they do make mistakes, you just have to catch them.
this is just basic stuff really, there is more advanced things to learn, but since you've actually said you are diamond level, you already do all of this and more. if you don't do all of this, than you are either a diamond player who is purposely being lazy, dying on purpose (they are really easy deaths to avoid, don't make excuses since you either know you are going to die in a situation, or you don't know and a diamond player playing at bronze 5 would know), and really losing on purpose; or you aren't as good as you think you are.
if you say you don't ward and the other things because it doesn't help in low elo or whatever, you still aren't doing what a diamond player would do to even help themselves out, not just the team. the way it helps a diamond player or anyone else with enough knowledge is it gives them free kills and reduce their deaths, which in turn leads to more drags, towers and everything else.
if you don't want to listen, then i'm just going to say that you will stay where you are, unless you passively improve. saying the system is broken isn't going to change it. it's not going to bring you up in ranked and if you say you can't climb because of your teammates, then no one will actually believe you are more than bronze in skill level, until you prove otherwise. imagine one of the really bad players on your team (like the gnar vs the nasus in your one WW game for example) saying they are diamond in skill, that's kind of how you look right now.
again, not trying to be mean, but i am trying to show you how it looks to everyone else.