> Performance reviews at most companies are useless and it doesn't take long to figure it out.
Not just useless but political and down to interpersonal relations more than they are to actual work.
I used to work for a major tech company that would have their employees write a plan for each year. It would be agreed and signed off by your manager.
At the end of the year you were supposed to use this as a template to see if you had achieved your goals, and that would be part of some sort of grading which would affect any bonus, promotion chances and any pay rise you might have coming that year.
Only, in between the two the year would happen. Business realities and management direction would change, and what you did bore little relation to what you planned to do. So instead of you being graded on how much of your plan you had achieved, you were graded much more fuzzily, usually on how much the manager liked you or how much you made them look good to their superiors. I'm not saying this out of bitterness either, I was usually one of the more favoured ones.
When I had a few years under my belt I decided that it was much easier to be a contractor and opt out of all that sort of ****