Tbh I don't think the worst problem here is with stating something is overcomplicated but the directness and variously pointed use of 'you'. People will naturally be more defensive.

Many of the example statements involve this use of 'you' in the same fashion. 'Did you even read my email?', 'If you would have read the whole email you’d know the answer to this'. It's a deliberate use of 'you' like an intensifier.

With minor rephrasing these could just be expressed more passively, for scenarios where one doesn't want an almost completely euphemistic tone.