What you need to understand about any ranked game is that you will always have trash teammates, but you need to also know that enemy also has trash players. In bronze, it's often about who abuses who, don't help lanes that are falling behind, help the lanes that are stomping. If you can't gank your stomping lane because the enemy have anti-tower dive champ or are simply always too pushed up, ward for them, warn them and try to setup counter ganks to get yourself ahead.
If your botlane for some reason doesn't ward and just sits and gets their ass handed to them by the enemy jungler it's their problem, you can guess where he is going but you cannot stop him from getting ganks he wants if hes ahead of you and if their botlanes better.
Don't contest objectives you cannot contest, udyr is especially good at soloing objectives so you should track the enemy jungler, see if they are ganking, topside, backed etc. and try to get objectives by yourself when you know they dont have vision and are not pathing towards it. It's especially important to splitpush with udyr. If you know you cannot make it to the fight or that it definetly will be lost, or 4 enemies are trying to towerdive your botlaner then take herald or top towers (or both if you're that good).
Remember, this game is all about YOUR performance, if you can do good you will climb, people who can't will stay at their rank or drop. I'm at this ceiling right now where I'm struggling to get to gold as my teammates are just feeding their asses off and my wr is dropping hard, because I can't catch up to the enemies that are fed.