Many were tipping McIlroy to pick up his first title in 2017 in Scotland, following a tie for second at the British Masters in Northumberland prior to the three-course tournament.
However, the Northern Irishman once again struggled to light up the event and ended up finishing joint-63rd on -4, a massive 20 strokes behind winner Tyrrell Hatton, who became the first man to defend the title.
The four-time major winner, who was frustrated with his level-par final round on Sunday, will now take an extended break from action to prepare himself physically and mentally for the 2018 campaign.
"My final round of 2017 kind of summed up all of 2017, with not much happening either good or bad and I was sort of stuck in neutral," McIlroy said.
"I will not start hitting balls until the end of November, so the next few weeks is about rehab and being in the gym and getting my body right so that I will be right to go into that practice and start 2018 strongly."