Cavalry and chariots against infantry

[Domen]

If this was the standard formation of the hussars' infantry enemies

Nope it wasn't. While facing cavalry, infantry formation was in close order - at least pikemen (IMHO the fragment which you quoted regarding "passing to the rear after firing" refers to musketeers only, not to pikemen - if I'm not mistaken - and this is just one of few alternative tactics used by musketeers).

Maybe you didn't notice - but this article is from 2000, so very old and there might be some mistakes there (the author has greatly improved in his research since that time).

I didn't bring up this article with intention to present it as 100% true in every aspect.

then why would anyone consider such descriptions as problematic?

"We saw it…. the hussars let loose their horses. God, what power! They ran through the smoke and the sound was like that of a thousand blacksmiths beating with a thousand hammers. We saw it…. Jezus Maria! The elite's lances bent forward like stalks of rye, driven by a great storm, bent on glory! The fire of the guns before them glitters! They rush on to the Swedes! They crash into the Swedish riters…. Overwhelm them! They crash into the second regiment - Overwhelmed! Resistance collapses, dissolves, they move forward as easily as if they were parading on a grand boulevard. They sliced without effort through the whole army already! Next target: the regiment of horse guards, where stands the Swede King Carol. And the guard already wavers!"

Actually this description is taken from a patriotic novel by Henryk Sienkiewicz.

And the author of the article link to which I provided, clearly writes, that this artistic description has not much to do with the reality of combat. Nor it does provide any technical details of the charge.

Read actually the part of the article, which is below this excerpt from Sienkiewicz.