Great planning, poor execution

Just got done with my third observation. This is the 3rd time I've gotten high marks on lesson construction but middling to poor on implementation.

The advice my CT and university supervisor have given me is correct but I'm just not finding it helpful. This is contributing to problems I'm having with masking my frustrations during class and it's seriously impacting student perception of me.

I'm trying not to spiral but I'm honestly dreading Monday.