Sharky,

I know how you feel on this one.... you've got twice as much work to do and if the old crusty would just let you get to it, your life would probably be easier, right!

Here's something to consider;
1. Why does it bother you? Could it be, just maybe, that you are starting to feel the captain inside of you just bubbling out? You want to show that you know what do and when to do it? I'm not saying this in a negative way. We've all been there.
you will find, when you make captain, that you will find your rhythm, and when the FO is trying to interject his rhythm it might throw you off. Maybe, just maybe, you're a type A+ personality, and you're spreading your wings too much and the captain who did this too you was just doing a little nipping in the butt.

2. maybe you are flying with really young captains that are threaten by how good you are. Cut him some slack, it's not easy finding your balance between being cool, and being in charge.

What is for sure, is that very soon you'll get to find out what it's like from the other chair!

For what it's worth, I brief the FO, " go ahead an just do T/O to the line and After landing, you're a pro- you don't need me" But there are times that the FO will start briefing T/O information at a busy intersection or at a place where you're listening for ATC because your experience tells you that you need to be listening for that call (taxi way D in ATL, or the 50 yard line in LAX) and might tell him to hold off. It might come across like the way your captain lopped you off at the knees, when really there was a reason.

Not trying to lecture, this string is about insight to the other seat. I hope this might help.

Stick