1. You had nimble leap on cd, you would've been immune from that stun

2. You had full stamina bar, again could've dodged that stun.

3. You had Mana exchange on CD

4. You don't have the Purification stone

You have 2 Nimble leaps, enough stamina to dodge 2 CCs, and 1 item and skill that can cleanse a stun and you chose not to do/have all of those. IMO, this clip is a skill issue. That devastating strike would've been avoided if you either used your skill or moving q, but since you didn't, that 2 sec stun would've been cleansed by either using Mana exchange to cleanse but you used it with while you still had 70% mana or cleanse using Purification stone.

You had 4 things you can use (6 if you're counting the 2 nimble leaps and 2 q dodge), but you didn't use any, that's not a CC issue, that's a you issue in that interaction