A little help to verify what I am thinking?

zero vs 1/8" toe may affect handling, but not all that much.

You started with "toe changed 3/4"????" If toe changed that much, it seems to me there is something major loose/ broke/ worn.

I'd be under there with a pry bar. Jack up the bottoms of the LCA and put jack stands under 'em so that the car weight is on the LCAs but not on the lower ball joints. Then you can see if/ how bad the lower ball joints are.

Particularly pry around the LCA pivots and see if the arms, lower pivots, bushings, are loose, broken, cracked. Strut bushings. Check them.

Now just an example of how difficult things can be, so, irregardless of toe/ other adjustments, tires can cause some REALLY strange handling. Tires that are worn some, but don't really show it, mismatched front -- to rear, etc.

A good example was many years ago, my boss had a fairly new Dodge D100, nice pickup, drove it a lot. We had a new pair of radials put on the rear with the existing front radials. Instantly, that thing was absolutely SCARY at more than about 50 mph. It felt as if the rear axle was coming right out