https://responsiblestatecraft.org/us-belarus-ukraine/#:~:text=Ultimately%2C%20Belarus%20received%20the%20West's,unforeseen%20damage%20to%20U.S.%20interests.
An interesting article which analyzes the fallout of the (rigged) 2020 Belarusian elections.
In short, Belarus sought an independent detente with the West following the 2008 Russo-Georgian war as a means of balancing against Russia. This accelerated in the aftermath of 2014 and Maidan. Belarus repeatedly resisted Russian attempts to assert control over the country, and rejected closer military and economic integration.
Post-2020, both the EU and the US abandoned reconciliation for a policy of maximum pressure, following the fraudulent elections that summer. By supporting protesters intent on overthrowing the regime, they forced Lukashenko towards the Russian camp. Fast forward 4 years, and it's a matter of when, not if, Belarus is fully integrated into the Russian state.
TLDR - Neoliberal / neoconservative foreign policy destroyed the prospect of an independent Belarus, and added 10 million Belarusians to the Russian demographic arsenal.
This surely is some kind of whataboutism. Wait for it