A person can spend years proving they were right about something that made them miserable.

Being right about a situation is not the same as being well. People stay in jobs, arguments, and relationships long past the point of any benefit because leaving would concede a point, and the cost of the concession feels larger than the cost of the years. The rightness is often genuine, which is what makes it such an expensive thing to hold.

Ask what you would do if you did not need anyone to acknowledge that you were right. If the answer is different from what you are doing, the position is costing you more than it returns. You can be correct and still choose to stop.