To me any kind of toxic positivity is certainly insensitive and is centred around delusional beliefs about the harsh reality of existing here, it's insane to say that existing "gets better" in this harmful world that is filled with endless risks and potential for the most extreme suffering.
In fact the reality is that existing will just get worse as we are destined for nothing but to decay from age and suffer a great deal in the process, the thought of reaching a much older age disturbs me, existing could never be a desirable state in the first place, I see nothing appealing about enduring something so pointless as existing, to exist means to suffer so unnecessarily.