Hello,
I have a simple solution we use to do back in the day in the neighborhood to resolve any problem.
It simple. It's called this "Put your Money where your Mouth is". Someone say I can't shoot four 3-point shots, in a roll, no problem, "bet $25 I can". "Hey you can't run the 40 yards in 20 seconds", no problem "bet $50 I can".
It means whoever is trolling you or doubting you, show them how much money you make. If someone want to challenge you, take the challenge and bet them money.
This is how you shut a troll/motherF**/bullshitter/talker/liar up. really quick. I mean really quick. Show them how much money you make.