Echoing other posts recommending looking into mechanically advantaged designs which multiply your force and ease your efforts.
If you are still looking for traditional Secateurs or bypass pruners, I LOVE my Okatsune 103's. They cut easier and cleaner than any pruners I have ever used (including Felco's) and they come in a smaller size (101) that may fit your hands better. Have made thousands of cuts already with no diminished performance and no sharpening. Completely amazing.
