I'm not being a hater, but we landed on the moon 55+ years ago and now we're doing a flyby with 35+ year-old engine tech. It's good that we're doing something but we should be doing better.
Also the heatshield is designed in a way that is cheaper to manufacture but less safe.
In 2-3 years we should expect a Starship mission to Moon, at a much more sensible scale, as in the amount of scientific gear and actual researchers delivered to the surface (and then back).
You’re not seeing better engines because there aren’t any. We are reaching the limits of physics.
That’s why we are working on alternatives like refueling in space or reusable ships.
The Artemis missions are testing things that we still have a lot of area to improve upon — materials (a huge one), international standards for things like docking ports, computing, radiation safety, and a lot more.