The Xz backdoor and a near miss on the F-Droid app store show how the entitled attitude of some people in the open source community can be used to push malicious or insecure code.
It's probably far more common than most people realize. Open source software doesn't automatically make it secure, and in many cases can be less secure than closed source as it's just one or two people doing it for free.
Much easier to be tempted to do something wrong or to get others to help in and take the weight off.
I mean, they didn't though
Theoretically, well-funded teams would be able to create more secure software and fix vulnerabilities faster than some random guy who works a full-time job and codes in his free time
I'm sorry that I'm apparently not getting my point across to you
Proprietary software is often made by a corporation, who pays full-time developers. Those full-time developers are given a salary to work on that software. That salary is normally more than what open-source devs make off their software. The team who is paid to work full-time on the software will patch issues faster (theoretically)
I bet you'll find something wrong with this, but I don't care
Closed source software has the exact same bullying issue, the difference is instead of the bullies being random people on the internet, they are managers with power over you. They are at least as likely to make you do something dangerous as the randoms, but they don't have to try as hard to hide it.
Bullying in closed source software is a company culture issue. Bullying in open source software can come from anywhere, and a good CoC won't necessarily fix it because outside community members can just bully from different accounts. But that also means bad company culture can't be fixed as easily as playing whack-a-mole in a FOSS project.
You're manually reviewing the entire code of every open source product you use? Manually reviewing the code at every commit of every open source software you use?