Walmart had already ruined ASDA to be fair, it's not like private equity is doing worse.
So many well-known UK companies have been sunk by debt interest on loans taken out to acquire said companies.
By all means use the companies to secure loans, but the liability should be on the books of the parent companies not the companies being acquired!
There have even been cases where the companies have been effectively asset-stripped by "sell and lease back" of property, leaving the companies a shell of their former selves with no meaningful assets, so as soon as there are any unexpected headwinds they collapse.