A good flank and aerial enemies can give Pip a hard time that he will not use potions for allies instead for himself. Try use cauterize as well. Resilience also a good counter for his slow and chicken durations.
When Jenos catch you with Void Grip, you only need to use your poppy bomb, (for this situations you should go Jolt) then you have to escape as quickly as you can, if he goes The Power of Cosmeum, doesn't matter, you are inmune to Crowd Control.
Be really careful with using Planted against him, he can easily Reversal and destroy you if you aren't careful, don't use if it's not on cooldown, and don't feed it by canceling your planted or aiming somewhere else