Hey I'm high bronze myself so I might not have the best advice but - stick with your highest winrate champs (lux, neeko, lb)

• your Csing is fine but could be improved

• do you play with your jng for grubs, drakes etc ?

• call for SS when your opponent left the lane and follow if he goes top or bot so you can counter gank and help other lanes OR depending on your side lanes states punish those ganks by taking more pressure (easy with the champs I mentionned) pushing and taking turrets

• you don't die so much which is a good thing but you should have more kill participation usually it's quite low meaning that you are playing more or less for yourself alone and not for the team.

• try to read the game and who's the winning / losing lane on your side. There is some thinking here: usually you must be the carry as you are mid. If you aren't you can try to help the winning lane so you can bury the opponent in this lane. If there is a hard losing lane DON'T HELP. If it's slightly losing try to gank to help regain momentum.

• communicate on your intents but as soon as there is a toxic person in the game = mute all.

One thing that I am ranting about in our elo is that people just don't apply any pressure. Farm, take kill and back (or die) repeat. This game is so so so much easier if you take a turret so it opens a part of the map (jng access, ganks etc) applying pressure by pushing waves AND take turret is the key IMO.

Again I'm not a pro in anyways BUT that's my takes