Yeah it's probably not doing great, compare lemmy active user count to that of writefreely , it does a lot better, even the number of servers is increasing, the number of other projects starting that compete with lemmy (piefed, sublinks) is also not a great sign .
Not trying to belittle anyone, i just believe in the importance of negative feedback and defensive pessimism.
On a more positive note, the amount of donations lemmy receive (which i think should correlate with high quality usage of the platform) has increased moderately (see november 2 numbers when they started posting the numbers with current numbers) .
Calling it hate is an exaggeration , people are entitled to their opinion and informing other people by criticizing snap.
Another advantage not mentioned is that snap is a product of canonical (a for profit company talking about an IPO for years), flathub is managed by the gnome foundation (a US registered non profit, which should provide some legal protection).