Tim accuses everyone else of being lazy or stupid.

Tom (real guy) was too busy all the time to do anything other than the 80/20 rule. He was too busy because he didn't share. So of course he was a fixture of the company...

but the CTO is a nice guy who just had a management training, so instead, both you and Tim are sent to a mandatory conflict resolution class

Each developer works in their own little silo and doesn't bother to learn the code outside their silo. Each team member developers their own idiosyncratic style. If they have to work with someone else's code, it's unfamiliar and they make slow progress and get cranky.

Now all the developers are going to the CTO or CEO and undermining the other developers, trying to persuade the CTO that so-and-so's code is shit.

No, not unless you’re somehow able to make the team, the CTO and Tim feel good at the same time. If you figure that part out let me know.

But if Tim's work is so bad that you can prove it..... How can a boss dodge the proof? I guess Tim should be fired second, the boss should go first...

> How can a boss dodge the proof?

This is a business decision, reality has no influence here.

That's why they invented the term "Business reality".