Oh man I can relate, I once took a home project which took around 6hrs and then was subsequently invited for a full day of white-boarding with 10 different people throughout the day.
Didn't hit it off with the last interviewer so it was a no-go.
If a take-home is required I'd at least expect a code review over it and focus the rest of the interview process on soft skills rather than trivia questions that are answered essentially by the take-home exercise.