I’m really surprised to hear someone say that their Pioneer 206 blu ray burner is rubbish - then say that they have ‘tested’ mostly CD’s and the drive is total crap for those.
What brand of CD-R disc do you burn? For what purpose? What speed do you use for burning? What ‘test’ are you using and what drive are you using to ‘test’ with?
Have you - in fact - burned any BD discs?
That you are having unfavorable results with a burner so many others love may possibly mean that it is not all the burners fault for the results-eh.