9 month old puppy still not housebroken

I’m at my wits end. I’ve tried everything. My 9 month old goldendoodle pees and poops in the house at least 3-5 times a day. I feel like all I do all day is mop floors. She goes all night without an accident, so I know she can hold it. I take her out first thing in the morning, after she eats, plays, wakes up from a nap. I reward her with praise and treats when she goes outside. Nothing is working. She’s been to a trainer. I’ve limited water. If she doesn’t go potty when I take her out, she goes back in the crate. But if I turn my back for a second she will squat. She has accidents in her crate during the day, but not at night. I’m so frustrated and stressed, and have thought maybe this isn’t going to work. I love her so much. I’ve never had such a hard time training a dog. I just don’t know what else to do.