- Your entire theory relies on VCs having some power over decisions being made at Atlassian. That isn't the case. The founders of Atlassian have always been in control. After taking VC money and going public, they still have over 80% of the voting shares [0].
- A downturn of 5+ years would be the longest downturn in the USA in the last 100 years [1]. Anything is possible but it's unlikely to be that bad.
[0] https://www.businesswire.com/news/home/20220527005335/en/Atl...
[1] https://en.wikipedia.org/wiki/List_of_recessions_in_the_Unit...