Generally, this is not the preferred approach to building good working relationships (though it might feel like the most satisfying).
As a designer you are often expected to justify your deisions. When someone else makes a design choice, you could expect the same of them and ask them what their reasoning was behing the change.
It may make you realise it was a good decision
It may give you an opportunity to defend your choice
and it may also help re-establish why you are there n the first place and why decisions are made and not just for the fun f it.