Usually this is somehow fluent what is "the worst" advice, since it rather depends on context, and contexts changes.

There is, though, one thing that was bad idea from the start, on so many angles that even now I believe it is actually " the worst " idea you can have : imagine you have a team, you have work to do, and, as usual, there are people there, and people have their goals and opinions. The worst thing you can do there is to engage with politics, either team- or company-wide.

I was specialist from Poland in German automotive branch. Cars, trucks, AI, this kind of stuff. ( It just sounds interesting, trust me )
Small company working as subcontractor.

The first thing I though is something like, why this or that person is going to tell me what to do or why is he allowed to rat me out or talk behind my back... so this guy told me this is how it is around here and you either play it or suck for everyone. So I went with it, if they want to fuck with me, I will fuck with them.

So fast it went House Of Cards kind of way and in the bad way kind of way. Instead of getting progress we were busy doing political stuff, usually law related, like finding each other misconducts, and there were no end to it. As I had most experience I with systems and stuff we were doing, outcome was pretty good for me, but after some time it escalated to such size that atmosphere was unbearable and I was so stressed and tired of this shit I left. It's miracle that management tolerated this so far. People were as toxic as nuclear waste site (or dota/lol players)

So far the conclusion is to sometimes suck it up once in a while or just clear the atmosphere as fast as possible. Otherwise you will wade in shit up to your chin for very, very long and it is not really healthy on the long run...