Actually she could beat quite number of people from there.
She would beat any other female bar Temari, none of them have speed feats to dodge this amount of weapons:
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Sakura and Ino were lacking in offense and speed, she would just dice them with kunais.
Hinata is slow to dodge that amount of weaponary, also Tenten knows a lot about gentle fist.
No explaination for Kin.
Yoroi needs to get close to suck chakra, Tenten can attack from long range even in close range she probably has decent taijutsu because she trains with taijutsu users.
Zaku used wind blasts, but they were not spammable, i think she can take him out by manevouring around
Can beat elastic guy that fought Kankuro if she keeps her distance.
I think she can dodge Chouji's attacks, she can win if she plays her cards right.
She can dodge shadows of Shikamaru and spam weapons to overwhelm him.
Can beat Shino if she can K.O him before the bugs reach her. He took Zaku's attack i don't think he can dodge that amount of weapons.
People think she was way too weak but overlook the fact that Temari was one of the strongest fighters in prelims.
There were 20 people fighters in prelims.
Tenten could beat Sakura, Ino, Hinata, Kin, Yoroi, Zaku, elastic guy which makes 7 people. Can potentially beat Shino, Shikamaru and Chouji, 3 people added. So about 10 people can be taken out by her, that's decent imo.