Ok so I worked for the WHO and other agencies on Covid vaccines (distribution, not development) and had a WHO email address. So take this as you will. But reimagining history to support a narrative helps nobody.

The virus was not "getting weaker" - Delta was more deadly. People only get immunity after getting infected (or vaccinated!), so with a naive immune system it doesn't matter whether it was caught in April 2020 or April 2021.

And for this:

Quote Originally Posted by Magpies1959 View Post
they used the spikes of the virus to develop the vaccine, rather than the core of the virus, which would have produced a stronger longer lasting vaccine. Why would they do that I wonder... oh yes to sell more vaccines., kerrrr ching.
Vaccines were aimed at a variety of parts of the virus, including "whole virus" approaches such as inactivated or live-attenuated virus approaches. That's what Sinovac is, for example. It just wasn't as effective.

By "the core" I assume you mean targeting nucleocapsid proteins, one of the four key protein types in the SARS-CoV-2 virus which is held inside the core of the virus. Companies went with spike vaccines because they were quicker, even knowing that they risked being out-evolved by the virus. Even AstraZeneca, who committed to an initial non-profit model. Research does continue though.