This reads like someone who works only with junior devs or not very good devs. I work on a team of senior devs who are very good and if there is ever an issue w

This reads like someone who works only with junior devs or not very good devs. I work on a team of senior devs who are very good and if there is ever an issue where it could be attributable to one or more people, those people will argue about who created the bug: "It is probably related to the code I added yesterday, I will fix it." ... "No, I'm pretty sure it is my code. I'll take a look". The best way to improve is to admit to yourself that you can always be better. Someone who thinks they are the best has no reason to improve. Anecdotally, I've found the people who can admit their mistakes easily are some of the best programmers I've met.