While they didn't get the initial billions promised in the deal because of non performance, they are still collecting...
As noted in your link, Foxconn isn't collecting money from the government of Wisconsin. They were allowed to buy building materials from local suppliers without paying local sales tax, a waiver equal to ~10% of what they spent on construction in Wisconsin during the same period.
That's unlikely to have cost Wisconsin tax revenue because the state has excess industrial capacity that would otherwise be idle, and most of the work was done during the worst part of the COVID downturn.
Speaking of which, your source also accused Foxconn of laying off employees 'as soon as subsidies expired,' but didn't acknowledge to their readers that in the same period (early 2020) the entire US economy lost 10% of our workforce due to lockdowns.
...taxpayers have spent hundreds of millions [on infrastructure improvements] that they will probably never recoup.
The roads that were expanded aren't in a low traffic area; they're adjacent to the main highway between Chicago and Milwaukee, on the southwestern edge of Kenosha.