That’s been my biggest struggle as well. I can spend way too much time finding the right map for an encounter, only to never actually use it.
The other option is building the encounters around the map, but a lot of the maps I find don’t ‘inspire’ me a whole lot, or aren’t thematically relevant to what I want to run (this dwarf king’s tomb looks cool, but I’d want at least a few other rooms in this dungeon, with other encounters. And my players are on a quest to kill a dragon, not a dwarf king)
I almost prefer a minimalistic tool; just a basic map that I can draw up quickly, basic tokens for enemies, and just flesh out my descriptions more.