Figma has a near monopoly because it built the better product. This is the preferred outcome compared to Adobe broadening their monopoly not by building a better product, but just by acquiring/squashing their competition.
Monopolies aren't illegal. Preventing competition is the thing we want to stop. As far as I can see, Figma doesn't do anything to give themselves an unfair advantage or prevent other players from entering the market.
Figma had 8 funding rounds in 10 years, according to crunchbase. That is an advantage compared to other players on the market that do not receive VC. If it's fair or not, that’s up to everyones own standards.
I think the more common term is to "raise money". But at the end, you receive money that you should spend. With strings attached, of course. That’s the nature of VC.
Should the other players not have also raised VC money if it was such a differentiating advantage? Perhaps they should have sold even more equity than Figma did and raised more money if that would have been the difference maker.
Monopolies aren't illegal. Preventing competition is the thing we want to stop. As far as I can see, Figma doesn't do anything to give themselves an unfair advantage or prevent other players from entering the market.