Vexing
Part of speech: verb
Definition: To trouble aggressively, to harass.
Example sentence: Putting is so difficult, so universally vexing, that the best the pros can do is tell us how to miss. 'Miss it on the pro side,' they say, meaning miss it above the hole. I can't even do that consistently. I miss it on the pro side. I miss it on the amateur side. I miss it on both sides of the clown's mouth.
Infuriating
Part of speech: adjective
Definition: Extremely annoying; frustrating
Part of speech: verb
Definition: To make furious or mad with anger; to fill with fury.
Example sentence: There's more luck in poker. Getting good at golf requires a certain amount of physical aptitude. Both take a lot of patience. Both require knowing when to gamble - either with a big bluff or a high-risk shot. Both can be infuriating.