Welcome, and I'm sorry your cooking failures had an audience. Naturally, that's really embarrassing but most of us can recall that experience.
I shudder when remember a very important business dinner party I hosted many years ago. From that, I learned to never marinate shrimp in fresh pineapple juice.
The expensive shrimp turned to mush because of the enzymes.
For your particular problem, like the others........Thermometers are your friends.