The “heavy and slow” meme from DND is all wrong. 2h swords IRL are actually faster then 1h swords. Think about it - not only do you have twice as much strength to swing it, you can spread your hands out for increased leverage, which only magnifies that strength.
IRL 1h swords are 1-2 lbs (less then 1kg). IRL 2h swords are 1.5-3 lbs (up to 1 kg or 1.5kg max). They are not all that heavy at all. The fast nimble blender is actually more realistic.
The traditional “heavy and slow” chop technique is more how you’d use a woodcutter’s axe, not a weapon on the battlefield. Also executioners swords, which are a real thing, and would have been very heavy indeed (3-5 kgs+).
Check out scholagladiatoria on YT, he’s an antique weapon collector and he shows you the old techniques using the actual, still-surviving swords of the day.