"expect holding at XXXXX, the next sector is not taking your handoff".
Then before I get to XXXXX the handoff gets accepted.

Now that sounds a lot more reasonable for ATC service.

Yes, I agree. And it also suggests that in the original scenario, a
good tack might be along these lines:

ZXX Center: N1234, Potomac Approach is refusing to handle you, say
intentions.

N1234: ZXX Center, If you'd like to offer me an amended clearance or
holding instructions, I'd be happy to consider them, N1234, over.

Note the trailing "over" which in this context means "the ball's back
in your court"...

--
Cheers,
John Clonts
Temple, Texas
N7NZ