It’s not just you. I worked at JPL for twelve years and I expected it to fail too. I can’t tell you how happy it makes me to be wrong about this.
Why did you expect it to fail? You have some inside info about the problems they were facing?
No specific inside info. But seeing how the sausage is made makes it amazing that anything they do works at all, let alone that it so often works as well as it does. I was particularly primed to expect JWST to fail because I lived through the Galileo antenna failure and the Hubble mirror fiasco.
We're all still traumatized by the meters/feet problem. Oops, I mean the Newtons/pounds problem.
Unfortunately small problems can still happen. The recent Lucy mission to the Jupiter asteroid belt had a problem with one of the solar panels not properly unfolding. However they feel the remaining panel has sufficient power to complete the mission.