Strong on Weakening, Weak on Strengthening?

Burden.of.Floof

Hey 7sage hive mind! I just finished the Strengthening Section of the CC and I struggled more than I have with any of the other question types thus far. For a lot of people it seems like after going through weakening, strengthening feels easy. I'm having the opposite issue... my entire weakening section went really well, but once I got into middle difficulty level, to harder questions on strengthening I feel like my accuracy plummeted. I'm hesitant to move on in the CC until I really understand this question type. Does any one have any thoughts as to why someone could excel with weakening but struggle with strengthening? I even tried negating answer choices to try and weaken the argument but I feel like it doesn't work for every question.

Thanks in advance!