the medicine that is given is too hard and can destroy the kidneys.
Renal failure is common, but it is primarily due to septic shock, cytokine storm, hypoxia, and the general procoagulant state we see in COVID patients as opposed to having an iatrogenic cause. There is a risk of propofol infusion syndrome (which can cause renal failure) given that these patients are often on high doses of propofol for weeks at a time, but that is a very rare complication. I have seen no evidence that any standard drug treatment used in ICU is causing such high levels of renal failure in these patients.