I am a part of several different critique groups. In every one there are writers I trust, and writers whose critiques I take with a very large grain of salt. The ones I trust, I trust a lot. If they tell me something is wrong with my MS, I listen. I change it. It's taken time to get to this point. Time and a lot of critiquing.
Finding someone you trust with your work, and whose opinions resonate with you isn't always easy. To begin with, I thought I had to listen to everyone, change everything anyone said was wrong. I started doing just that, and quickly realized it was not in the best interest of my work. Often people had vastly conflicting ideas of what was wrong.
A lot of my choice as to who to trust has been based on their writing. I'm far less likely to accept the feedback of a writer whose own work is riddled with errors because I can't trust that what they're telling me is correct. I also have to take into account how they accept feedback on their own work. If I point out a flaw, and they get all defensive and snippy with me, I'm less likely to trust their critique.
But I feel lucky to have found the people that I have. Sure, I guess we'd all like a larger pool of critique partners, but in reality, how much time does anyone really have? And what a luxury it is to know I have these good people at my back who are unafraid to point out a character's motivation in a certain scene is unclear, or that I used the word 'just' 19 times in a single chapter. Or that the basic premise of that short story is inherently flawed...
How do you find people you trust with your work?