I've finally managed to do quite an awesome effect with the use of rothoscopy and pan and zoom, but there seems to be a black edge at the title's and the quality of the text is quite bad, this has nothing to do with the font itself as I've used it before with bigger resolutions. I'm using composite on every track so it is all with invisibility. How can I get the text to be of more quality and fix the black edge?

Here's the video: https://vid.me/qcZT

And here's the setup: