WGA busts captains to first officer and them moves them back to captain. Second chances up the ying yang. Additional sim time is given in training. Instructors are known to take time on their own dime to provide additional tutoring, and there's no shortage of line pilots who will bend over backward to help. If someone doesn't make it at WGA, it's entirely their own doing, and certainly not the result of a strict company that does not give a "second chance." If you can't do the maneuver at all, that's one thing. If you make a mistake, nobody is going to end your career over it. If you have an issue during training and it's trainable, then life goes on, so will you, and you'll repeat it.
If you can't make it at WGA, then it's not likely you'll make it anywhere. Whether a candidate makes it there is largely a matter of how much effort the candidate puts into it; they're not giving anything away, but they're absolutely not a place of zero second chance.
If you're asking about busting an interview ride and coming back again, I have no idea, but if you're talking about the culture there and second chances in training, on the line, and in recurrent, and if someone has told you it's not a place where personnel will work with you, then you've been told a lie.