1.
The disappeaance and reappearance of Laurie:
2.
The promise ring drama:
4.
Jackie's tolerance of Kelso:
7.
The timeline, in general:
8.
Especially everyone's ages:
10.
The time-based continuity errors:
11.
The treatment of Fez:
12.
And Fez's treatment of women:
16.
Honestly, just all of the final season:
17.
Especially Hyde marrying Samantha:
18.
And, of course, Jackie and Fez:
We still love you, That '70s Show!!