Hi, I started CP just 2 months ago and half of the time I'm confused where to solve problems from after solving the daily tasks (I've solved around 80% of them). I set unrealistic targets like solving all binary search tagged problems under 2000 rating (of course I fail to solve it as they are too many) and then I switch to other platforms as I think they are better. I'm don't stick with one platform for long as I've an inner feeling that if I use other ladder or platform I'll get faster results. What should I do?

Set realistic expectations/goals. For example, my current goal is to solve 100 1600 rated problems by end of this month.

The goals you are talking about are not only ridiculous, but also waste of time even if they were possible. Solve random problems. Right now you should focus on 800-1200 Rating problems. If you are insane like I am then you can go upto 500-600+ rated problems than your current rating. Learn greedy, two-pointers, some number theory and practice a lot of random problems (not topic-wise divided). For example you can aim to solve around 60 of 800, 1000, 1200 rated problems, and gradually move to higher rating as you get better.