I dont know what to do anymore Please help take 3 min to read this :c
Short story I was silver 1 last season because of a plat 5 friend that helped me duo. Back then i didn't care it was just me wanting to be a higher rank than my friends. So happy with my rank i got cocky yet realizing how bad i actually am. i got so cocky and thought i was so good that i duo with another friend hoping to get him to silver. I ended up screwing myself... i did bad and made his game worse, making my mmr why to low also. instead of helping i screwed us both. later on i stopped playing ranked and waited for new season to arrive. Still not realizing how bad i am i jumped into ranked without any champs i knew and played champs that were "OP". i won only 4 out of 5 ending up in bronze 1. i built up the courage to play ranked and got to silver 5. Getting cocky once again i played till i got to bronze 2 currently. I don't know how to get out i have tried a lot of things knowing me i haven't tried it all. my mmr is bronze 5 i know if i keep playing i will get there sooner or later.
Things I have tried: -I have bought wards 1st back trying to place as much as possible ( around 7 or 10) each game.
-I started finding the champs i like to main taking my champ pool to around 4 or 6
I did duo with someone with lower mmr but we won most of the games and i almost hit silver 4 cuz of him but i fell off later gettin cocky :/
I have played many normal with the champs -I control my rage but i end up going on tilt on frustration
I loose about 25 lp and gain 11 or 12 now currently very stuck i was wondering if i just go ahead and get to bronze 5 and go from there is best for me. I have 3 months till a guesstimate season end.
*please i am open to any suggestions go hard on me i suck and im currently trying to get better ( please dont troll also)
Thanks very much

with the last item being situational. of course zhonyas is a good item to have in the build at some point, usually before or after void.
for
when you got your sightstone. Having an upgraded sweeping lens on blitz is vital as you can kill wards, wait for someone to be dumb and walk by, and hook them getting free kills. (it is still something you should do on all supports though.)
or
.
In this same game, your masteries had a point in bandit, this isn't really that great as you only get like 50 gold from it through the entire lane phase.