Every time somebody complains about their knife or asks me how I like my brand or the brand x they heard is the greatest, I ask them this:
Is your knife sharp?
They always answer yes. This is almost never the case and once I check, their knife is almost always dull.
No matter what knife you’re running you will be happier with it if you learn to properly sharpen. Fillet knives are probably the worst culprit because by their nature they have to be flexible and that limits the hardness of the steel that can be used in their construction. Therefore they need more regular sharpening and they need to be touched up to remain sharp.