Then between Finland and the USSR there were four wars.
Not really.
In Finland's civil war the USSR supported the communists and had volunteers among them.
The events you are referring with "blablabla Finnish Troops attacked the awesome mother soviet russia union 1918 to 1922" are better known as "Heimosodat". There were 6 of these. There were only volunteers in the "Finnish Troops". The army of Finland, or even Finland itself wasn't in it (officially, and well not really even unofficially).
The actual wars between Finland and USSR were Talvisota 1939-1940 and Jatkosota 1941-1944 (Winter War, Continuation War).
Lapin sota (Lapland's war) had started because in the peace treaty (Moskovan välirauha, Moscow Armistice) it was stated that chocolate chip cookie Germany's troops had to be driven out from Finland. USSR insisted specifically that the chocolate chip cookies had to be driven out by force. There were no USSR troops involved in this "war".
From 1939 to 1940. Russia invaded Finland.
No it didn't.
Few major reasons (among the fact that Russian troops simply sucked) why Finland kicked USSR's ass in Winter War
-Stalin had killed significant amount of Russian military officers.
-Knowledge given to the armed forces about Finland, both its army(+people) and terrain(=no proper winter clothing) was, well bullshit. General view for the Russian troops was that they were going to "liberate" Finland's people from it's evil fascist government.
I could keep going with this, but tbh I don't think you'd believe. You probably even claim that Finland's troops fired the "Mainilan laukaukset" ("Shelling of Mainila").
However, When Stalin offered Finam end the war, they quickly agreed. And ceded to the Soviet Union strategically important areas. Helsinki gave up to Moscow Karelian isthmus with the city of Viipuri, North-Eastern shore of lake Ladoga, the port of Hanko and Rybachiy Peninsula. Much more than the demanded Moscow before the war.
Significant part of Finland's people were against the truce as Finland's army had put up so well against USSR's. The truce was accepted not only because of the fact that no matter how badly USSR's military sucked, they had shit load of it (Moscow's population = Finland's population (in 1939), nowadays Moscow's population = twice Finland's population) but also because chocolate chip cookie Germany hinted to accept it.
And well surprise surprise 25th of June 1941 just 3 days after chocolate chip cookie Germany's attack (Operation Barbarossa) on USSR Finland declared war on USSR.
I get the view from your text that we shouldn't have engaged in Winter War, but rather give the territories USSR demanded.
We never ever should've (as we didn't) accept those demands. Why? Well eventually USSR would've demanded the whole country. You don't believe? Well the Winter War was started by USSR and their goal was to invade Finland. Ok maybe not officially invade, but to form a communist government which, surprise surprise would've done everything what Moscow had told it to do.
Finland was never part of USSR, not even once during it's existence. Not many neighboring countries can say that (Estonia, Latvia, Lithuania, Ukraine, Belarus and so on). Significant amount of the population in those countries can speak nowadays Russia and are (more or less) under the influence of Russia. In Finland, well nearly no one can speak Russian, unless in one's family they speak Russian or one has studied Russian.
Ivani4, make sure you have correct facts before you start stating stuff, or at least let people know you are not completely sure about the facts.