How worthless is Philosophy?

[Belacqua]

My problems with modern "philosophers" are
1 - Usually their ideas have already been implemented by people who are smarter than them.
2 - They see their ideas as revolutionary, but will likely not document these ideas except for on social media such as Twitter or Facebook.
3 - They won't even consider others points of views, and will make shitty Ad Hominem arguments to avoid productive conversation.

I certainly agree that these three points are bad things.

I wonder which modern philosophers you're thinking about. I'm no expert, but I can't think of any of the well-known ones who match the above descriptions.