Yup, that is how the OEM consoles are. Even my knackered originals needed hammering off the wishbones. Only the poly aftermarket ones slip in easily.
The Passat wishbones are slightly tighter than the steel arms from memory, and perhaps the FEBI bushes are slightly tighter than OEM, so they're both conspiring against you.
Try some silicon lube on the wishbone/bush and keep at it.
Did the Febi bushes fit in the consoles OK? I bought the Febi S3 bushes from Darkside ages ago but haven't yet fitted them.
Hammering I would be OK with! I was hammering the Febi units quite hard and they were not moving beyond about 2/3 way... They were the complete assembled parts, so bush already inside the aluminium carrier. I tried WD40, copper grease, everything.
This morning I went and bought some Lemforder OEM replacements (MK5 specification, not S3). They went on exactly how I would expect them to have gone on; tight and requiring a good strong tap with a socket, but not needing a hydraulic press. From ECP which means I paid a massive premium even with the 'discount'.
I will send the Febi items back. A real shame because I liked the look of the bush - a nice solid piece of rubber.
If I were doing again I would probably avoid mixing the Febi rear bushes and Passat wishbones. As you say, could be that the Febi bushes are a bit tighter and the Passat wishbones are a bit bigger.
Quite a few things coming together at the front end; aluminium subframe inserts and new bolts, Powerflex ARB bushes (to match rear), Passat wishbones and Lemforder front and rear wishbone bushes. Hoping the effort is worthwhile!