This drives me totally crazy and looks desperate.
Im sorry but if you follow someone on twitter, it should be because you're interested in what they have to say, not because you want them to listen to you.
For example, I made my twitter account 2 weeks ago but only posted my first videos today. In that time ive had about 100 people add me then remove me a day or two later. No interaction. No interest in my content or myself (cause I had no content and few tweets). Ive even had a few guys add me, remove me then days later add me again, with their self-description being "follow back".
If you want to gain subs/followers ask yourself, would someone who is popular do this? Or would someone who is clambering for followers do this?