troublesome

adj

1. Causing trouble or anxiety.

   “The computer has been very troublesome for me. It never works when I need to use it.”

   “As was the case with the "Merchant Navy" locomotives, some of these features have proved troublesome, and this in turn at times has reflected on performance as well as on maintenance.”

   “The problem is that the likes of Shapps and his boss Boris Johnson are eager for a fight with the unions. They are being deliberately provocative, so they can portray railway workers as 'troublesome trots'.”