>>3528
Ultimately my guy, the primary reason is because canon giantesses are not written to tickle people's dicks. That's numero uno amigo
The second gripe however is more valid, that giant/esses are often subject to the Worf Effect- we implicitly recognize a giant as a powerful force, so when something normal size beats it up, it's a cheap way of saying "oh man, look at that guy, he's really strong, he beat the shit outta that giant/ess!"
There's probably stuff that's more up your alley- I remember one French comic about a giantess (ugly though, so maybe not so up your alley) royal that people bowed and scraped around for fear of being eaten on the spot.
Oh, there is Radiant, a French anime- I haven't actually seen it, but there is a giantess in it that's the queen of a country and considered one of the most powerful beings in the setting.
Aside from that, there probably are other works out there that make giants legitimate physical threats, but don't expect to find that in mainstream content because if giants exist, then the setting is naturally going to revolve around them, due to their innate size and power, and if the story doesn't want to focus on that, then they need to be tamped down somehow, and oftentimes the way that's done is by making Worfs out of them.