A couple of things:
As said Dragomira was a werewolf hunter for a couple of centuries. You are ... not really successful for long if the prey you hunt is way stronger than you.
Especially since werewolves are intelligent human beings and retain their full mental capabilities in transformation.
Meaning she is extremely likely physically stronger than the strongest werewolf.
That is the main reason why I believe that she is playing to be overpowered by the fledgling Werewolf and she WANTED to be fucked.
The older a vampire gets the more experience s/he gets and the more time for training s/he has as well. And I'm not only talking about physical training but mental one as well. Like turning into bat/mist, fly, mental domination/seduction, ...
I'll ignore the section you said about Twilight and making sense.
Call me old fashioned if you must but in my time vampires sucked blood and not cock.
That's succubus territory ...
Every single story about regular humans successfully hunting vampires(Ancient and young alike), werewolves, demons and more would rather vigorously disagree with the notion that you can't hunt prey stronger than you successfully for any length of time.
Heck, every big game hunter currently living in the real world today would similarly challenge that idea.
All we know is that Dragomira was a successful werewolf hunter. We have been given ZERO info on the specifics of how. If all she needs is a precious few seconds to strike a killing blow before they can become strong enough to overpower her, well then it makes sense how she hunted them successfully for so long.
I mean let's look at the Underworld movies. The early ones, before Selene went Maximum Mary Sue and could solo anything anytime for any reason. She was capable of fighting evenly with werewolves in human form, and even overpowering them but when they went beastmode she relied on guns or ran the hell away from them as fast as she could.
Even in stories that do lean into the trope of Vampires getting more powerful with time "just because" they will often introduce that the power boost Werewolves get after they change shapes is sufficient to overcome all but the most ancient and powerful vampires of all. Twilight and Vampire Diaries being good examples. In those sort of settings when Vampires need to beat a werewolf they make a point of how critical it is they do so BEFORE the wolf has time to change forms and try their best to avoid confronting them otherwise.
There's ALOT of variations to how supernatural critter powers compare. Some favor vampires. Some favor werewolves. Some favor Chupacabras and Snarks. lol.
We just don't know enough about the critters in this setting to have a clear picture of how they truly stack up against each other. I mean heck, even amongst the Werewolves at this point the MC is quite a bit more powerful than most at the college and he hasn't even been training that long. Who's to say there aren't Werewolves out there beyond the college who've trained their powers and fighting skills far beyond the MC who could make complete and total mincemeat out of Dragomira even in their human forms?
Well, the Dev I guess. If he cares enough to start quantifying these things.
As for Dragomira and the MC i agree: She definitely WANTED that dicking.
But her reaction afterwards made it fairly clear she didn't want it to happen the way it did. Actually ended up feeling a bit rapey. I'm sure she could have overpowered the MC in human form. She does if you go in there in human form. But all the available evidence so far seems to suggest Werewolves in beast form are a match(physically at least) for even elder vampires, and stronger werewolves like the MC can match even ancient vamps in his beast form. They might still have an experience advantage but experience only matters if the raw physical ability gap isn't that large.
We don't yet know enough about the gap in raw physical power between wolves and vamps for this setting.
All that's assuming we're talking about a head-to-head fist/claw fight. In an actual hunt where the hunter is using tools, guile, and stealth....even humans become a viable threat.