Some more uncomfy details for the Finns.......
1. The Soviets offered an equal land exchange with Finland prior to the Winter War, meaning every square inch the Soviets wanted in order to increase the security of St. Petersberg, would be compensated with an equal square inch of Soviet territory in exchange, as the Soviets foresaw a likely invasion from Germany (or Germany+Finland) via Finnish territory given the vulnerability of St Petersberg and they were ultimately proven correct.
2. The Finns did not begrudgingly accept an alliance with Nazi Germany because of operation barbarossa. Finland was an ally of Nazi Germany prior to the Winter War even breaking out. Finland had German military advisors on its soil, it was receiving military equipment from Nazi Germany long before the Winter War broke out, and politically Finland was within the orbit of both Weimar and Nazi Germany.
3. When the Winter War peace deal was being hashed out, the Finns asked for the territory exchange deal that they were offered no less than 8 times prior to the war. But the Soviets responded that the ship had already sailed on that deal. That said, the Soviets only took from the Finns what the original land exchange deal had proposed, and considering how costly this war was for the Soviets, I don't think the terms of this peace treaty were all that punitive. The Finns decided to fight instead of negotiate, and the only thing they lost was the land the Soviets proposed to trade.
4. It was Nazi Germany who initially encouraged the Finns to take the land exchange deal before the Winter War even broke out, and it was Nazi Germany who encouraged Finland to surrender with conditions, recognizing that the Finnish position that did not allow for any kind of negotiations was unrealistic.
5. Unlike the Soviets, who stated their intentions while attempting to negotiate a territory exchange deal with the Finns prior to the Winter War, the Finns during the Continuation War had no clear cut revised border in mind as the Finns went far far further than simply reclaiming what they had lost during the Winter War. They were essentially trying to create a greater Finland by taking as much territory as they could get and defend.