Your kid sounds like my older kid. I bullied mine into applying to MIT, GT and Olin. She worked hard on the MIT and Olin apps, didn’t get in. Did NOT want to go to GT and really did a half-hearted application and didn’t get in.
She’s not sad that she didn’t get in, and is very excited about where she’s going (honors college at UA on the presidential scholarship), and feels like the apps for the reaches were a huge waste of time. She had some phenomenal options with her matches (and a few surprise stinkers, like a lot of the 2017 kids)
My H was deeply aggravated by having to fill out the CSS form, as well.
For my 2018 kid, we’re focusing on matches and safeties only-she, like her sister, does not want to be “the dumbest one in class”, and I’m older and wiser about the college process, and won’t push her to apply to a place where the odds are against her and she would feel less than accomplished (something she is actually more sensitive to than her older sister).