Good. I've tried another shitty (but better) power adapter and it seems to be working pretty well...Even the red led over the rpi has stopped blinking. Even though, the bolt icon remains at the screen (but this time without any sort of stuttering or sudden death of the system).
Also "latest" is not a version number
Sorry, tried my best to make a consistent topic adding images and relevant info. Anyway, thanks for the reprehension