Hindi Serial - Uttaran - the strange happenings in the life of Ichcha, and how she lets everyone walk over her

How can they make such a character such as Ichcha ? They show a person who is totally in favor of her friend Tapasya, even though she has known in many occasions that Tapasya was the one who was against Ichcha, and who had even conspired to attempt to get her killed. The same with her parents, who also knew this behavior of Tapasya, but attempted to take it lightly. The same with her nani (actually her mother's aunt), who was a very bad influence on Tapasya, forever poisoning her mind against Ichcha. And then Ichcha was willing to sacrifice the love of Veer, who loved her devotedly, and who was totally unhappy with Ichcha, so that Vansh could marry her.
And this is where it gets complicated. Vansh is the elder brother of Veer, and was a drug addict who started recovering to some extent based on the efforts of Ichcha, who was trying to help a younger drug addict (and it was then she came into contact with Vansh). Vansh tells his parents, who would do anything to help him get free of the drug habit, that Ichcha is the one person who can totally help him by getting married to him. This pushes his mother into a huge problem since she knows that her younger son Veer also loves Ichcha madly. But for her, the issue of being able to help Vansh is a very strong influence, and Veer would also do anything to help Vansh. Ichcha also agrees to help in this matter by marrying Vansh since she reasons out that by helping somebody like this, this will be something very big that she does.
However, nobody had yet told Vansh about the love between Veer and Ichcha; and Ichcha tries to tell Vansh about this in a letter, but the totally villainous Tapasya manages to intercept the letter and change the contents. Her idea is that this will be told to Vansh just after marriage so that he is very shocked and this will be bad for Ichcha.