Yeah, well you're supposed to not like him, so I guess he's doing his job.
And (just a guess) I'd bet that Charlotte is going to leave him holding the bag.

Or the writers are hoping we'll just not notice. Or the writers don't know that low-level techs don't get administrative authority.
The techs would know that they don't have that authority, and that would be the first thing they'd tell Maeve.

Handling the situation where a host exhibits unusual behavior would be on page 5 of the Reconstruction Technician's Manual. "Hard shut-down and call your supervisor."
If you want to keep your job, (and Felix did say he needs this job.) you follow the manual.

Nah. If Sylvester was a machine, he would be programmed to work smoothly with others. Being a jerk to your co-workers is pretty much a human trait, and not one that you would build in on purpose.

Yes. F and S are low-level technicians. (As far as that goes, their jobs could easily be done by robots.) They would absolutely have procedures for dealing with a "malfunctioning" host. Basically "shut them down and call upstairs immediately." That would be part of their training and they wouldn't think twice about…