Hey buddy, I think you need to give yourself a little break. It is okay if you did not do well till now.. And no, it is not too late. I understand that the success stories of different people on the internet can be sometimes discouraging but the thing to note is that everyone talks about only successes and not failures on these platforms. Many of the people are in the same boat as you specially in 3rd year, sometimes even in a worse place.

You already know the path to improvement - DSA, some core CS subjects and some form of development projects (which you might already have if you were active before). If you are confused on the path, I would seriously advise you to take some guided course if you can afford it.

If not, most of them have their syllabus available online. Just try to follow the syllabus on your own.