Climb out showed a constant struggle of flight deck with engine controls, drove the plane like a Chinese cab driver from full power to idle to full power.
With regard to this particular aspect of your post, I suggest you compare this experience with an Easyjet A319 departure out of Luton through the London TMA at a busy time. This can be quite normal and has nothing to do with "struggling with engine controls" or safety.
Blocking Emergency Exits certainly does though.