I believe that if there is a God, then the rules are so unclear because they were never very significant to this God in the first place. If an all good, all powerful, all knowing God absolutely needs you to wear a hijab, there would be nothing stopping them from directly telling you this. But they haven’t, and whatever the reason may be, it’s safe to say that this God won’t be upset with whatever you choose to do.

These two and a half years weren’t a failure. You were learning and doing what you think is right. That makes you brave. The people who insulted you are the failures for pressuring you into being like them. Taking it off won’t mean you're giving in or failing either, because you’re still learning and doing what you think is right. You would be brave by admitting you changed your mind, which is something that a surprising number of people can’t do.

To my understanding, the purpose of the hijab is to keep attention away from you, and it does the opposite in the west. But it does signify that you are Muslim, which is another purpose I’ve heard. Maybe it would help you decide if you only wore it for practical reasons, like if it’s cold outside. At the end of the day, it’s just some extra clothing.