As 411 and fireflybob quite rightly point out,there are just as many "difficult" First Officers(and pursers for that matter) as there are Captains.CRM has been directly responsible for this new breed of co-pilot who thinks the flight is conducted by mutual consent.Actually,CRM was never intended to bring this about;it was designed to promote crew intra-communication and coordination,not promote democracy.Unfortunately,the purpose behind CRM has become diluted over the years and people have interpreted its raison d etre to suit their own needs and aspirations.Which is why we have some first officers who refer to the flight as "my flight",and pursers who say "my passengers" and "my cabin".
I flew with some "difficult" Captains in my time as a co-pilot but I never let this color my perception of just what my role was;a co-pilot,there to assist the aircraft commander as best I could.It seems that the quiet self-assertion of yesteryear has transformed itself into the arrogant one upmanship of the "me me" generation..thankfully in only a minority of cases.
If you come across a truly awkward SOB in the left seat,the only option you have as a co-pilot is to request not to fly with the guy again.And tell him what youīre doing and why,AFTER THE FLIGHT.
As for taking control of the a/c,thats a definite no.... unless the guy is heading for a mountain or heīs in the middle of a cardiac arrest.Not because you dont think he should be Captain,or heīs not strictly adhering to SOPīs.SOPīs werent invented to give the co-pilot a pretext to take control...after all,we dont all hit the glide with gear down and intermediate flap..its not the end of the world after all.Might be a noise-abatement approach...