As a disclaimer, I am not a fan of these kinds of hate crime designations. I think they aren't that useful and they are prone to misuse.
However, I think part of the issue with it in terms of things like upskirting is how we decide what motivates certain types of crimes.
So, for a simple example that people might think of with hate crime, say beating someone up because they are black, or bombing some sort of worship building of a particular religion. These things are done because the person has some strong animus against this group - hatred. The law is supposed to recognize that besides the primary crime - assault, bombing - there is an element of hate against an identity group that is especially heinous.
In this other instance, you are saying that the reason someone takes illegal photos up a woman's skirt is because he hates women. That's arguable though - the main reason for doing it might be because he gets a sexual kick out of it, or will later looking at the photos. It's not done to "get" women, it's done for sexual fulfillment. He may not give a crap about women, or respect them, but the motivation is basically satisfaction of a physical urge.
I think that probably complicates a lot of these kinds of specific crimes against women. Domestic abuse for example. Is it about hating a woman in particular, or about bullying your sexual partner who happens to be a woman because you are heterosexual. It's not like there isn't DV in homosexual relationships, and yet we don't usually say it's due to misandry or misogyny.
If hate crimes or legislation about hate is going to be meaningful, it's going to have to be pretty specific in terms of being the fundamental motivation, rather than sex or mugging or whatever.