Since 907, Russia has been involved in at least 175 wars. Of those, they were the assumed victors in 107 cases, and one of those is illogical but counted. In the rest, they were defeated or fought to a standstill. They are involved in 3 different active wars today, 2 of which are going to be long-term disasters for Russia, but there they are. Over their history of war the most striking observation is that a treaty carries little meaning in the Russian language, they get signed, and then, 1-2 years later the war starts up again. The wins that the Russians have had almost invariably been revisited at a later date. A term that gets used in relation to Russia is the concept of "defensive expansionism". Despite Russia being the aggressor in the majority of wars, the insecurity they feel results in taking action to attack a neighbor to protect their border with that neighbor. They then have a new border to be anxious over, and then attack that country. The term "trust" is not one that describes dealings with Russia over the last 1,000 years.
Finland and Sweden have every reason to be wary of Putin and his horde. The UK's declaration of support for Finland during the NATO membership process is one of the very few things that adds some credibility to the UK as a free state.