Play Mei. She can solo contest points in the cluster that is Bronze. The freeze will help your aim, and the Cryo-Freeze + 250 hp will make you a fair bit harder to kill compared to 200hp heroes. Mei play literally took me from bronze (1200-1300) all the way to gold (2100) and I could even pull her out reliably in high gold games to win before her buff.
In regards to your “flexing,” stop filling, pick a hero, learns with them, and win. Bronze games are weird and there’s little coordination. You must take matters into your own hands. Don’t fill with support unless you can take care of yourself because chances are low that you’ll be receiving reliable protection.
EDIT: After checking the link above, I can see one of the issues you’re facing, same as I once did. STOP PLAYING ANA AT THIS RANK. You will get more value out of literally any other support since ult combos, in the rank you’re attempting to play at, are nonexistent. Also, people freak the **** out when they get nano boosted in low ranks because they don’t know what’s happening or what’s expectsd of them.
Unless you’re truly deranking, in which case you’re scummy.