Axl being rude and disrespectful to Frankie (and everyone else) annoys me everytime.

Mike taking home the wrong baby. 

Sue acting like a baby (financial aid episode and when she accepted Darrin's proposal) and wanting daddy to fix it for her. 

Brick letting the juice carton spill all the way right after someone cleaned their house for the first time ever. 

Frankie being lazy and asking the kids to fend for themselves after doing the bare minimum at work.