Is anyone else frustrated with the lack of projects that have been done other than the mars rovers?

The mars 2020 rover and future dragonfly and DAVINCI missions are really impressive but it feels like they're avoiding anything harder and just doing the ones where it's easier to land or orbit like Titan and Venus.

I want to see missions like a Neptune orbiter or a mercury lander, NASA has been trying to get a mars sample return funded since the late 90s using two Titan 4 rockets but it looks like China will be the first with the Tianwen-3 mars sample return.

If I could choose one mission I would do a Pluto rover.