This depends on the manager more than anything else. Somebody who complains all the time is just as likely to come across as low-credibility and untrustworthy.

This depends on the manager more than anything else. Somebody who complains all the time is just as likely to come across as low-credibility and untrustworthy. If they’re the only person complaining perhaps that’s a signal to the manager that they’re in fact a problem for the team they’re working in, and perhaps they shouldn’t be there anymore. Conversely somebody who readily gives credit to others might come off as high-integrity and trustworthy. Perhaps a person like that is an incredibly positive influence and valuable member of their team. Each approach can succeed or fail depending on what your manager values. I wouldn’t say one is more likely to succeed than the other, but if you want to end up working for a boss that values integrity, then I’d suggest taking the integrity route.