Why is everyone picking on the WHO constantly? It's like it's a reflex at this point, as far as I can tell designed to shift "blame" off of... other parties who got lots of stuff wrong.
In this case you're spinning really hard. The WHO guidance you're quoting, quoted in the article you link, was really mild: "“Given lack of effectiveness and possible harm, routine corticosteroids should be avoided unless they are indicated for another reason,” WHO authors wrote." Is that really unreasonable? In January they didn't have evidence of effectiveness, and drugs have side effects. Sounds like correct reasoning to me. Do you actually disagree?
And in any case that quote is from a document in January, the current version (from March, also linked from the article) is here, and makes a bunch of complicated points about steroid use, citing contemporary research which was inconsistent about effect: https://www.who.int/docs/default-source/coronaviruse/clinica...