Russia has a f-cktonne of oil and gas, particularly gas. Most of Europe (including the UK) is dependent on gas for power. Putin has, to an extent, stabilised the former Soviet republics. Russian funding has bankrolled domestic European politics (particularly in the UK). All of which meant that no one was particularly keen on upsetting Putin in case the lights went out or the magic money tree stopped funding pro-Russian conservative political parties. Abuses in Chechnya, Georgia, and the Crimea were frowned at, but sanctions were limited.
Putin is playing a long game. It's based on restoring Greater Russia as his legacy. It's a long-held dream of certain political groupings in Russia (see Foundations of Geopolitics) and several of the steps identified as required to achieve this have already been taken.
Ukraine has been a step too far, and the ROW have been forced to react because Ukraine chose to fight back and not accept Russian annexation.
Most people are just trying to get on, do the school run, not fuck up at work and remember to pick up a pint of milk. Why does he think the world revolves round Russia?
The price of petrol/diesel burned as you do the school run has massively increased because Russia invaded the Ukraine and the ROW has imposed sanctions on Russian oil and gas.
Your job is under threat because the energy price increase is squeezing your employers margins, and you're worried whether or not your wages will increase to keep pace with inflation in the cost of living because Russia invaded the Ukraine and the RWO has imposed sanctions on Russian oil and gas.
Your pint of milk has increased in price because the cereals that go into cattle food, and the energy used to collect, transport and process the milk have all increased in price because Russia invaded the Ukraine and the ROW has imposed sanctions on Russian oil and gas.
We let the world revolve around Russia when we sleep-walked into dependence on Russian oil and gas.