You can bet EVERYTHING you have that the same suspects complaining about Messi staying would be the first to label him a coward and an opportunist and a traitor for leaving to PSG or City.
When that's the case, it's not a legitimate complaint. It's simply agenda.
If Messi were to leave, I would wish him well. He's done everything for this club and he deserves a better team around him.
That's when I had no complaints about him leaving last season. He earned it, and it probably would have been better for everyone if he did leave. At least then we could start our rebuild properly.