It was split in two.
1. Calling it "the china virus", as the former president was wont to do, was labelled racist/bigoted/nationalistic by those who did not simply agree with anything he said.
2. The claim that it originated in the Wuhan lab was viewed as unlikely, and there was (is) an alternative biological origin story which at the time seemed credible and more likely.
It was practice. Past tense. The WHO changed that practice in 2015 [1]. In fact they explicitly list Spanish Flu as an example of why that practice was flawed.
"Terms that should be avoided in disease names include geographic locations (e.g. Middle East Respiratory Syndrome, Spanish Flu, Rift Valley fever), people’s names (e.g. Creutzfeldt-Jakob disease, Chagas disease), species of animal or food (e.g. swine flu, bird flu, monkey pox), cultural, population, industry or occupational references (e.g. legionnaires), and terms that incite undue fear (e.g. unknown, fatal, epidemic)."
[1]: https://www.who.int/news/item/08-05-2015-who-issues-best-pra...