There is a major issue here, which is that until you've completed proper clinical trials, you don't know if it is a treatment or not. Until there is clear and proper evidence to suggest a treatment works, it is just an "experimental drug". Plus, proper clinical trials involve double-blinds where neither the patients, nor the researchers know whether a particular person is on the treatment or the placebo. It's necessary to eliminate any placebo effect from the results.
Covid-19 isn't the only serious disease in the world you know. Cancer killed nearly 9m people in 2015, diabetes is estimated to cause up to 5m deaths a year. We're constantly working hard on new treatments for these diseases, yet you cannot just pump everyone full of an experimental drug each time one is developed because you cannot then gauge clearly whether a drug works or not, what effect different doses of the drug may have, etc. etc.
Yes, it's tough to say this, but if you want an effective treatment for Covid-19 as quickly as possible, you MUST follow the proper scientific processes to test the drugs first. Otherwise, you'll end up wasting time down blind alleys, approving flawed drugs that may not help much (or which may unexpectedly make things worse), plus all manner of other issues.
You're correct when you say that many large trials have been abandoned when a group shows increased mortality - this is because the trial is being performed in a proper and controlled way and it can therefore accurately show that the drug isn't working properly. In these cases, the trial is halted. Pump everyone with the drug however and where is the baseline? How do you know mortality has increased? Simple, you can't tell without a proper, blind control group to compare the results to.
Believe me, I want an effective treatment for Covid-19 to be developed quickly just as much as you do, but if you piss away hundreds of years of scientific process in a blind state of panic, you won't end up with an effective treatment. All you'll do is cause more problems than you will solve.