Opinions are just that, personal opinions. Opinions themselves do not cause problems - how people perceive them is what causes the problem.
Clearly, you have a problem with the idea that someone believes Pathfinder 2e is going to fail. That's your issue to deal with. I also believe Pathfinder 2e is on a rocky road - that's my opinion, it doesn't serve a pre-existing narrative and nobody can say to me my opinion is a problem.
I DM 5th edition because I burnt out running 3.5 due to heavy prep and cognitive overload as a result of rules complexity. For that reason I never ran Pathfinder 1e and, similarly, I'm not going to try Pathfinder 2e.
At this point 5e is the the Heavyweight champ of D&D, not perfect but the game all the newbies recognise. Good luck introducing new players to the overtweaked and constrained P2e let alone new GMs. If you are new to fantasy tabletop RPGs, what game are you going to adopt, the wildly successful brand name 5e which everyone is talking about and has massive social media exposure or the new game Pathfinder 2e which has proved divisive amongst its fanbase and which many people are not trying because of 5e.
I do actually wish Paizo good luck because competition is a good thing and more options for fantasy gaming is always better. However, I don't think the right strategy has been chosen here - at the moment it looks like all eggs are in one basket when it might be a good idea to develop for 5e as well.