False. Not all. There's a reason why people were hopeful.
https://youtu.be/5i4BpTcBdrc?t=415
There are many more like this.
I understand the "doesn't work" at least when given late during the course of the disease (no idea when early, that's why we have RCTs to find out, otherwise it would be already done and deal), but causes harm? Aside the retracted study, even the deaths in the high dosage arm in the Brazil study, which prompted unmasking and lowered dosage, were defined "a statistically insignificant trend" (death is always serious, of course, but those words need to be taken into account).
Unless by "causes harm" you mean for availability for treatment of other diseases, of course.
A bit unrelated, but during the peak, my parents shared a video kn Facebook that I found quite surprising.
A doctor, with a legitimate medical degree and patients, made a meme level conspiracy video about how since a patent existed on a vaccine for a previous coronavirus, it would also treat COVID-19, but somehow tied the patent owner to Bill Gated and into a conspiracy by Gates to depopulate the world.
I nornally consider doctors pretty intelligent people, but jesus christ.