Well it's correct behavior. Websites from the 90s should load instantly now. Any website loading longer should deliver some amazing content that was impossible in the 90s
Why do websites have to ship 12 MB of JavaScript before they even start to load? In lots of cases SPA have no benefits for the user and just make everything bloated and complex as hell and due to the insanity of the JavaScript packaging also super hard to keep safe / up to date.