I hope that this topic is being addressed. Multiple users have mentioned this before, but I will share my experience about being unable to break free from CC.
Being unable to break free from CC is not associated with any particular skill being used against me. It can occur from any CC. Incapacitating Strike, Fossilize, Charmed, Streak, etc. will all cause this. It can also occur in any venue. Cirodiil, Imperial City, Battlegrounds, and even duels at someone's house.
In every case that I have noticed, I have more than enough stamina to perform the action. Just lastnight, I was at 100% stamina and couldn't break free from an incapacitating strike for 2 solid seconds, so I had to tank a spec bow and whatever else came after. I survived, but that's not the point. This issue happens far more often than it should and it causes far more player deaths than it should. It shows itself in almost every encounter that I have. We are fighting the game just as much as we are fighting other players. This carries over to casting skills as well. Multiple very deliberate(slow) inputs are required for skills to cast, and it is for no apparent reason.
Why exactly is this happening? I suspect that it is the inability for the game to register inputs as fast as it should. Given how performance has been lately, I think that this is very likely. This is clearly not an isolated experience, and I would sure like to hear from ZOS devs about how it will be addressed.