Disgruntled with my supervisor - be truthful about this in my semi-annual PhD report?
First and most important suggestion: Seriously consider changing supervisors, and if you can't, give serious thought to finding another university/institute at which to do your Ph.D., contacting relevant researchers and if you find someone who's willing to advise you, making the switch.

But about your actual question:


  A little sincerity is a dangerous thing, and a great deal of it is absolutely fatal.


― Oscar Wilde, The Critic as Artist 

Only be honest and forthcoming in your report if you want to have an out-and-out fight with your advisor. You might want to do that for various reasons, but assuming you aren't, don't write what you've told us.

Instead, bury it into nuance and insinuation. i.e. without denigrating what you've actually written and where you've published, put it in the context of the hope of writing something deeper or more meaningful, or publishing someplace more central. Also, mention things you would have liked to have done these past 6 months, and explain how the efforts gone towards preparing publications have not allowed you to invest as much time as you would have liked in the other pursuits. That sounds super-polite and respectful while giving off enough hints.