Yep. Unless a company actively engages clients to get product feedback, it's unlikely that the end users even have the clout to complain about app performance until a vendor improves it.

There are times that I perceive the community trying to convince itself that web devs can have their cake and eat it too. That it's not just possible but easier to built performant, accessible and maintainable apps in React/Angular/Vue, when that's just not a universal truth. Sure, those tools may make certain aspects of development easier through the abstractions they leverage, but those also come with a cost (i.e. breaking API changes seem to be in vogue these days).

Ultimately, this part in parcel of the JS community. Aspects of the ecosystem feel so fragile (NPM, framework/lib churn, etc.) that it's easy to be cynical about web app performance.