So... after some 4-5 years of owning and fidling with my 2CV I decided to check/adjust the suspension. The car was with new shocks and no suspension complains.
When I came to the adjustable end-pieces, either way of the pot, I found them 2-3 mm tighter than recommented, so they were adjusted the Haynes way.
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Imagine my surprise when I test drive the car!!!

It became soft and supple and comfy as a true citroen should be.
Now I drive over bumps and holes and I hardly feel them.
Also the front-back oscillation was reduced together with the sudden "crashing" and the rear "bottoming".

you can,t beat the original set up taskos! don,t forget to squirt some cooking oil into the cans(both ends)

So I did.
Sunflower seed oil.