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Hey there, IllusionNote1!
The definition of jagged is 'having rough, sharp points protruding,' so jagged is not the answer.
The definition of draconian is 'excessively harsh and severe,' so that could possibly be it.
Insanely mean is not formal.
Crazy hard is not formal.
Your best bet is draconian.
Answer
It's important to notice the little things because it connects you to the person more.
Explanation: