'I would like the freedom to take advantage of other people's misery pay them minimum wage and work them hard so I get all the profit. Freedom for me but not for thee.'
Let's imagine China arming and supporting Mexico's opposition parties that align with China. U.S would go into a fit and invade Mexico instantly. Same has been happening in Ukraine for a decade before the war started. You need to also take in account that Russia has been invaded countless times from western powers. Russia's geography is also mostly flat plains, making it easy to invade Moscow from the west. Historical context need to be taken to account.
Channel your anger out towards the right people that deserve it, can be a relief. Hating yourself can be destructive. You are not the problem, most of the time is just shitty society running blind.
Kursk is not in Ukraine though, just Russia getting help to defend their territory.