stuck in bronze 4/3

SO before we say "youre hovering there because you belong there" let me say a few things

how come when im bronze 4, I get good teams who dont feed/rage/afk and teams I can carry with jg or top

but once I am bronze 3 I get toxic mid lux who says "cunt" "that was tword nasus" after I died to j4 for first blood,

Rude/toxic and bad jungler, who even though they gank, and we kill j4 She decided "hurp da derp ima gunna take all the CS so he cant farm his Q" and then proceed to blame the entire games loss on me (even though i admitted that I lost lane, I was just pointing out how riven was preventing me from Q farming)

An mf who is happy go lucky but dies all the damn time and doesn't take the game seriously

A braum who thinks kda = skill

who constantly points out in a toxic manner "I have more kills than you and im a support" even though I keep mentioning to him, that if he backed off and let others get the kill instead of TRYING to get kills we would have more kills and who also blames the entire games loss on me

sure I lost lane top, and didnt do good against j4 but how is it MY FAULT That mid fed diana, mf fed cait, riven would instaclear waves then blame me for not q farming and being a jerk about it, a toxic braum constantly pointing out kda

IF I HAD A GOOD TEAM

where nobody was toxic and nobody else but me fed and j4 was the reason the enemy won THEN SURE I know its MY FAULT and I NEED to improve.

or If I had a decent team, braum would stop taking kills, mf wouldnt be over extending. riven would have not taxed my lane and lux would have turtled, and maybe after I farm jungle and get Q to 200+ we could start coming back! but nope 3toxics and 2feeders (lux being toxic and a feeder) and somehow riot and the rest of the high elo community think that I deserve to be in bronze because I need to improve (even though i was silver V last season)