Divergent was enjoyable. It wasn't the greatest book ever, but I enjoyed it. Insurgent, on the other hand, made me want to ragequit about every half page. It's a good thing I can skim read 100+ pages in about 20 minutes or I probably would have clawed my eyes out. Here's a summary of the book using percentages because I don't have words:
25% awkward makeout scenes between Tris and Tobias
37% Tris angsting about Will
54% Tris angsting about her parents
99.99% Tris thinking about Tobias and how much she loves him and wants things to be "back the way they used to be"...THREE WEEKS AGO BECAUSE THAT'S HOW LONG THEY'VE BEEN TOGETHER
100% Tobias being an asshat
13% other characters that I am apparently supposed to remember from Divergent but don't
0% plot development or fucks given
100% Tris and Tobias being too stupid to live
67% inane plot twists
0% knowledge of how scientific research works
There's also all the times that Tris is supposed to die but then a plot device swoops down and saves her, the complete lack of editing, the 400ish pages where nothing happens, the enormous plot holes, and the horrible world building.
Allegiant, I will be reading your Wikipedia entry instead of slogging through anything that might remotely resemble what I just read.
ETA: Read Allegiant's Wiki entry. "Because genes and stuff" REALLY??????? NO.