How long is it going to take rito realize tahm building tank to do dmg is not ok?

I just played my first ever tahm game. I just ultied myself into the enemy team 1v5 before my team got there at 40mins ate their adc and won my team the fight with my engage and i came out with 70%hp. I felt so dirty after that because there was 0 counterplay to what i did. Pls nerf tahm kench