I posted my story of iNaturalist here.
I have a very old Android phone with which I take photos so upload using that application, but then switch to a desktop to fill out things like observation fields and see if I have any other similar observations. I cannot say I have ever been frustrated by the application or the website, but I tend toward patience.
I became a supporter of iNaturalist I think in 2021 because of gratitude. As I am not in the USA I make an annual donation though for simplicity of records.