If you want out of bronze hell, then you will probably have to party up with people and beat some of the silver monsters you are getting matched against. This is your opportunity to get out of bronze. I would maybe stop looking at it as a burden and more of as an opportunity. Make the system less confident by beating people the system thinks you should lose too. I may be wrong here, but I believe this will cause your volatility to increase again meaning higher point swings.
Regardless, finding a group of people to play with is essential. Pubs are horrible.