You can say what you like about the competency of our intelligence community, but I think if they were setting him up they might have come up with something slightly more damning than "might have taken a condom off once or twice".
Being incompetent and going beyond the requirements? The point is to have a minimum viable legal complication to put him into process that could convert to extradition while preferably having some anonymity requirements to hinder public scrutiny.
It is hard to criticize what works, but the second witness appears to be their asset.. Managing a vulnerable person into a situation and then into filing a complaint.