As one who always ended up hemmed in on Australia in Risk I make no claim to any military abilities. So I'm expecting an email from Mad Vlad any day now.
I saw a comment about the Javelin that suggested that siad is designed to fly upwards and then hit the tank on a downward trajectory, making the most of the relative upper weakness described by Allan above.
A comment in the same piece also suggested that, like the battleship and aircraft carrier before it, the tank has become outmoded as the main source of battlefield power thanks to weapons like the Javelin and the Turkish drones being used by the Ukranians.
The relatively mild weather this winter in the Ukraine has also apparently hindered the ability of heavy armour to operate off-road in the softer farm land. Sticking to the roads makes them easier targets for the Ukranians.
This site has been referenced quite a few times over the last fortnight by news outlets:
https://www.understandingwar.org/
Mind you Tucker Carlson on Fox News is a great favourite with the Russian State, so pick your sources carefully.
t'other Allan