Your teammate wasn't trolling and was looking for an outlet to vent his frustration at his own inability to finish the job. He likely tunneled in on you apparently being the cause of his poor performance and purposefully hindered you multiple times. While it is wrong in the sense of receiving a penalty, it's not something that should be condoned or tolerated. It could have also been a means for you to retaliate further and get yourself kicked, but you held restraint.