There are both solo standard (all individuals on both teams) as well as just standard (3v3 in any combination of 3 or 2+1 or 1+1+1 (team vs solo). If you think you're better than the division you are in then you have to do all the things the people in your division do not do. For example. If you really want to go hit the ball a lot, but both of your teammates also want to go hit the ball a lot, then you get to play defense and prevent all the goals they will never prevent and patiently let them play bunch ball until it squirts out for a tap in. Likewise, if your team has someone willing to be in goal often, you can then be more aggressive and use your superior skills to score.
A defensive minded approach will get you to the top of the new gold ranks/bottom of the blue ranks. Once you get to that level, players can combine hits in the air, and scoring goals is not something that is easy to do without combinations or top shelf strikes and everyone can play reasonably good defensively. Before that level defense is poor and many goals are conceded without even a wiff of a challenge. Those are mistakes that you can always try to prevent for your team. Assuming both teams have equal chances of giving up poor goals before the match starts, if you mitigate that chance you will over time improve. You can't win every game, but being personally accountable for things you could have done different is the only way to escape "bad" teammates.
Also, your anecdotal winrates are probably not accurate. If you are winning 95% of time in 2's across a large subset of games you should be able to escape bad allies in 3's single handedly.