Nami is garbage?! Lol what? Nami is brilliant character who is much better than Sakura, Orihime etc. She is not just beautiful female character with tits, that someone called her. But she is well written character, with not ordinary personality. Unlike Sakura she didn't have problems with herself. She never tried to be someone else. She is self confident girl, that have her own goal. Unlike Hime she is not just crying girl, she is great at physic and other science. She is doing her job perfectly. She is smart and have her own style. Nami easily could be MC, like some other SH, and her adventure will be interesting to read. Even gags with her have much sence, than for example Sakura,who beat Naruto without reason. In Nami's case after surviving hell she kinda didn't know how to show her emotions, that's why she is kinda boyish girl. Before time skip she was easily number one in OP as female character and in thoudend time better than any other mc female chatacters. After timeskip, she became worser as any other SH character, with exception Brook and Usopp, but she is still good chatacter. She is brave when she need to be brave, and strong enough to do things that she has to do.
While except that she got great character development: from girl who hates pirates, she became a pirate herself, from girl who hated fishmans, she even forgive Hachi and was ready to give any amount of money. She always was great character, and your trashing her just proves her greatness.