Everything you said I think the opposite.
1. I think these are some of the best Mario games.
2. I don't find them very complicated, their quite simple.
3. I think their SO fun!
4. I'll buy more Mario/Wii games definitely.
5. I am very happy with Nintendo.
6. I am not a hardcore gamer and I think these games aim for all ages/category's.
7. I rarely lost patience, you just need to practice.
8. I thought it was worth buying.
Maybe your just not used to playing these games, practice makes perfect.