Y'all Qaeda
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lol i don't think a good pm should be hated, the way you view a pm imo is why people hate them that you deem they should be opposed to the needs and expectations of a sm, imo they should largely be aligned. i do however agree that generally pm's are hated.
PM work by design is command and control. You said you'll get X work item done by today but it isn't so we'll escalate the crapout of you to show management that it wasn't the PM that stuffed up, but rather the dev.
SM work, we try to predict team capacity and give a general cadence and from there try to stop as much possible interruptions from happening so the team can work to the best of their abilities. Failure is encouraged as a learning opportunity.
Very different approaches. The two can live in harmony, but never as the same person.