I believe you can use either word, depending on your meaning.
“Confusing “ - if I found the presentation confusing.
“Confused” - if it was confusing for the audience. It’s a judgemental and rude thing to state. Though not grammatically incorrect.
November 30, 2023
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confusing
December 2, 2023
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you can say confused?
November 30, 2023
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