What is covid?

For two years now I have been trying to get an answer to this question.

Firstly the test is very fickle and no-one knows what it is they are really looking for. So if you test positive to a dodgy test, the only thing you can say with any level of certainty is that you had a dodgy test and it came back positive. So tests are null and void.

Ok let's do symptoms next, well so far it seems like every symptom of every sickness ever known to man is now covid. You can't even have a stubbed toe anymore without it being covid.

Lack of oxygen is the only cause of death on this planet. Other factors may lead up to that, but it will be lack of oxygen not getting to the heart and brain that will cause death. It has always been that way.

Pneumonia is a huge killer, killing over 3m people in the world annually, it has the same symptoms as covid. Did they just renanme pneumonia?

Most people don't know they have covid in which case did they have it or was it just made up nonsense to scare people?

The saddest part of all this is that people are being misdiagnosed as covid and are not receiving the correct treatment for what they actually do have and many die of what was actually wrong with them, because their real sickness was totally ignored.