I have been saying for a couple of years that Intel has been dropping the ball big time. They have had massive delays over several promised product launches and process shrinks and unfortunately for them, the rest of the world has caught up or even surpassed them. They clearly totally missed the mobile revolution, and with big moves from companies like Apple moving to their own silicon design, and even public cloud providers like Google and Amazon making their own server silicon based on ARM, Intel has gone from dominant giant to playing defense.
Ben Thompson writes about this in detail at Stratechery, and does an excellent job of summarizing some of the biggest problems facing Intel, which I highly recommend.