Driveshaft removal

You have a couple of options.

First, persist.
You have to jack it up high enough, support the hub up on an axle stand
(you can raise it with a jack slightly first, but replace the hub nut, hand tight first ),
remove the bolt and nut out of the lower ball joint,
then either tap the wishbone down with a block of wood or wrap a chain and bar around the wishbone and pull it down, for leverage.

Failing that, loosen the subframe that side,
there's a bolt at the front inbetween the front part of the undertray and the wheel arch liner,
and one at the back with a retaining plate around it.
Lowering the subframe will give you more room to lower too ( if that makes sense)

I've never had trouble popping that balljoint even without lowering the subframe, but it is a tight squeeze.

Subframe lowering...

Rear Bolt and retaining plate


Front bolt

You can completely remove both bolts from one side, this will let that side of the subframe hang 2 or 3 inches lower, but you can also pry it down a little more with a bar in there.

It won't fall off as it's bolted in at the other side, it sort of springs about.
You can see I did the same thing to release the hub knuckle, the red jack handle in there to pry it down after I removed the subframe bolts that side

This is how the JTIS suggests you do the job.

You can lift the hub up by jacking under the wishbone, put a block of wood in between the jack and wishbone, don't take it up too high or compress the spring too much though, then the axle stand will fit the flange on the face of the brake disc, then remove the jack.

This is rather a ropey way to go about it though and it's not something recommended, it's more of a dodgy shortcut.
I have a couple of scars on my face from when I did something similar on my Alfa, the shaft, hub, strut, disc and caliper slipped off the stand, and the spring under tension shot the lot out and ruined my modeling career!!