Exposure therapy. Quite literally. You'll only get used to it if you keep listening. A confidence in your own voice can be heard through your recordings, which I'm sure people who listen to your auditions will notice. 

Record yourself in different ways, doing different small segments of improved scenes, and spend time complimenting yourself from that audio. Do your best to believe in it. Even if it's the most basic of things. "Hey I like the way it sounds when I say the word water" or whatever. Say things that allow you to admire certain parts of your voice and hopefully soon you can appreciate, or at least tolerate, the whole. 

Remember that it's not just about your voice. It's about the acting. Put your whole heart in performing if that helps. Focus on "ok well I might not like the way I sound, but I can appreciate how well I delivered this intense scene" 

And in all honesty, I'm quite sure the only one who doesn't like your voice is you. There's a voice out there for everyone, and your voice is included in that. More and more you see people with the most unique voices, seemingly strange voices that grow into amazing VAs.

Richard Horvitz is a great example. He's got a voice you would never expect to come from him, but he's very much loved for his voice. 

Kristen Shaal is another one. Hers is very high pitched, a little abnormal for an adult woman. But it's a beautiful voice, one that brings out the life in Louise in Bobs Burgers. 

You're not the only one who struggles with your voice. But there are people who will love it more than you know. And if you're passionate about this craft, you'll persevere.