Rory McIlroy and Oakmont are butting heads, and it seems like the course is winning.Oakmont is flexing its muscle this weekend, and among those battling for a tee time this weekend is McIlroy.After he started his round with two double-bogeys in his first three holes, it was clear that McIlroy would not have his best stuff. His poor start bumped him to 8-over for the tournament, which is where he has been for most of his day.He let his anger get the best of him during the second round of the U.S. Open. McIlroy hit a shot and proceeded to Tomahawk throw his club ahead of himself.The misery continues for the No. 2 player in the world. He missed the cut last week at the RBC Canadian Open and struggled at the PGA Championship after his driver was deemed non-conforming.McIlroy has not been the same player since he won the career grand slam at Augusta National.He is struggling off the tee, and his putter is ice cold. Now it seems like his irons are giving him fits as well.From watching him chunk the club, it seems like he is ready for his U.S. Open to be over so he can go home and regroup.However, he is teasing the cutline, as throughout the second round of the tournament, the number has hovered around +6. The Northern Irishman got one back on 15 to get to +7. He likely needs to make birdie on one of his final two holes to see the weekend.McIlroy is fighting something within himself, and it is showing in all facets of his game. At least the Northern Irishman threw the club forward and away from people, unlike some of his fellow PGA Tour players.More Golf: U.S. Open: Sam Burns Posts One of Best Rounds in Oakmont History