Fake humility is just bragging that learned some manners.

Pretending to downplay something is still a way of pointing at it, and most people hear the difference immediately. The modest-sounding version asks for the compliment twice: once for the achievement and once for being humble about it. Actual modesty usually looks like simply not raising the subject.

When something goes well, try saying thank you and then stopping. Let other people decide how impressed to be without any help from you. If you do want to talk about the work, talk about the part that was hard or the people who made it possible.