so bronze players which are mostly new to rank and new to game are playing as such ? wow you dont say
but if u are still in bronze and cant get out via placements or climbing then u arent skilled enough to be out of bronze.
to climb you have to be better then what you are in, and you must play a consistent level over a number of games to win more then lose therefore rising /climbing til you dont ... that is your elo is where you no longer climb.
average player skill level is about silver 3 mmr. now skill level is a very vast and complex topic. there is all kinds of skill and knowledge and you may not have all of it together at once.
i know at my best if i was going back to grinding the game and playing serious ill be somewhere in mid to high gold. last time i ranked i had an account in gold and did placements on another and got silver 3. in games i play im against gold , plat and diamonds pretty regularly , i do hold my own vs them and there are times my inconsistencies come out and i look like a worst player.
this is the difference between low elo and high elo ... mechanical skills are typically in range of each other , its being consistent game in game out, trade in trade out, laning , rotations, item builds etc. that is why if you get better at fundamentals the meta changes dont mean anything.
this goes for pro play as well, ever wonder why the asian teams ( Chinese and Korean ) constantly do better at worlds then NA? well regardless of meta they are better fundamentally then the NA teams. and this is why they constantly win.