Fine, you want a response for it?
Whitebeard did suffer a defeat, and it affected how he viewed being a pirate later (he grew up).
- Kaido, Big Mom, and Whitebeard all got defeated by DR Xebec, and then their crew disbanded. Whitebeard later described his feelings about the Xebec crew, and stated that a crew like that is undesirable and he went the opposite way and defined his crew by family bonds.
Roger himself may have experienced a similar journey to Luffy, and actually did suffer some shortcomings. This is unverified information, but when you think about it, this means that the only person who hasn't suffered a defeat is the one other guy aside from Mihawk who we barely have any information of, the pirate king himself, so it's not that big of a deal to leave that element of the discussion alone.
Note: I've noticed how you guys obsessively put "likes" on anything people say against people you don't like. It's weird how you give each other thousands of likes just for having contrarian attitudes. You're encouraging each other to have mob mentalities, and you pursue witch-hunt style tactics. "Bro is saying Shanks doesn't respect people if they don't grow up- he's a witch!"
Extra Note: Sometimes, the only thing more dangerous than a question is an answer.