Subscriber numbers are going up, and per-member viewing is up 30% year-over-year. Yogi Berra once said about a restaurant, "Nobody goes there anymore. It's too crowded."
"... should I sell my shares?"
Yes, others would like to buy them. You can't have a smart buy without someone on the other end making a dumb sale. Too bad you didn't sell when the stock was in the $50s, and avoided the "big trouble" Icahn brings to a stock.