Smirkin, you have my sympathies. I've left people in tears after one of my critiques in query letter hell (QLH).
At some point, you need to make a decision. Either you are going to be a writer interested in publishing and being read by the public, or you are not. Either choice is fine, but one involves exposing yourself to the public and the other does not. I've had magazine articles published in magazines with 250k+ circulation. Think about how embarrassing it is to have a mistake like not knowing the difference between its and it's. Going public with your writing is hard. And every single thing you have published will have something in it that embarrasses you.
SYW definitely involves stripping yourself down and seeing how you look naked. It hurts when someone tells you that what you thought was a pleasing shape is described as a lump of clay. And an ugly lump of clay at that. But that's what happens whenever you show yourself in public.
But SYW also involves some control. Ignoring QLH, you can say what level of critique you want (personally the more complaints I get in a critique, the happier I am). You also can practice critiquing before you post your own work. And there's a lot more supportive people than people like me (but I limit my damage to QLH, where you shouldn't be if you don't have iron-clad cajones capable of handling lots of rejection).
SYW can be one of the best ways you'll find to advance your writing to where someone will actually give you some real money for it. It's not the only way. For some people it works really well. Others not so much. For others it helps them to find out why Publish America is so popular.
You'll get a variety of opinions on your writing, representing a bunch of serious readers and writers, and if you're lucky, with some real publishing experience. Getting paid for your writing is hard work and if it's money you're after, go work for McDonalds. The pay is better.
But if you're serious about being published, at some point you should try it. Because if you're like me, you'll try anything to make your work better.
Best of luck,
Jim Clark-Dawe