I should make my point more explicit so you can't misunderstand it.
> after 6 years we have just claims of where it came from. Isn't that suspicious enough?
No it is not suspicious, because most zoonotic pandemics have murky origins - spillover events are rarely identified at anything better than the species level. For evidence I point to everything on this list https://en.wikipedia.org/wiki/List_of_epidemics_and_pandemic... (starting with the bottom of the list, in case you come back with irrelevant comments about Roman technological progress).
We've got a fair idea where SARS-CoV-2 originated (horseshoe bats). It's the early path it took that's muddy.