Your hidden agenda is something that you wish you were good at but are unsure about it.
So you sort of resent - or at least find annoying - people who are "too cocky" about it, typically your benefactor but also your activity partner if of the accepting subtype (and possibly other types of the "right" subtype).
ENTjs and ENFjs resent the "excessively abrasive" Se EPs.
ENFps and ESFps resent the "know it all" Te EJs when discussing a subject of mutual interest.
ENTps and ESTps resent the "attention-seeking and limelight-steaking" Fe EJs (especially as they seem to do it "easily".
ISFps and INFps resent the "intellectually arrogant" Ti IJs.