As a fellow short guy this definitely an issue I face too. In a way you have to appreciate the honesty of these women who make completely categorical statements that they will not consider anyone below their own height, or even anyone below the average male height (so roughly 50% of males) or sometimes even setting their minimum heights well above the male average. Height is simply a major factor of male attractiveness, the problem is that unlike other factors it's not communicated well beforehand and comes as a shock to some men when they realise just how important it is in the dating market.

The other issue is that sometimes the exlusion statement is phrased in a nasty or blunt way that wouldn't be socially acceptable at all if it were a man talking about a factor of female attractiveness. I am sure there are males out there who make nasty and blunt comments in their profiles, but I am also sure there are fewer of them and they get ruled out for saying such things even by women to whom the statement doesn't apply.

Finally it's even worse that on many sites the statement ruling men under X height out comes at the end of the profile! So you might see how much you have in common with someone and start thinking about a cool date to go on and then get to the end of the profile to find out you never had a chance to begin with.

I would suspect this factor plays a part, but is almost certainly behind better nutrition, in the general increases in heights across the board through the baby boom and sexual revolution in Western countries. But you'd need to explain why it was particularly strong in the Netherlands for it to explain their above average height increases.