Learn Turkish: Ben senin iyi niyetini hiç suistimal eder miyim?

This is the core of rhetorical strong negation! The structure hiç combined with a positive aorist question like eder miyim? literally translates to 'Would I ever do it?'. By asking this, you are strongly implying the negative: 'I would definitely never do that.'

Could I use the negative aorist here and say hiç suistimal etmez miyim? instead?

No, that would completely flip the meaning! Asking etmez miyim? ('Wouldn't I do it?') rhetorically implies 'Of course I would!'. To rhetorically say 'I would never do it,' you must use the positive question form (eder miyim?) along with hiç.

Can you break down the suffixes on niyetini?

Sure! The root phrase is iyi niyet (good intention). Because it belongs to senin (your), it first takes the 2nd person singular possessive suffix -in, becoming niyetin (your intention). Finally, because it is the specific direct object of the verb suistimal etmek, it takes the accusative case suffix -i, giving us niyetini.

What kind of word is suistimal, and how is it usually used?