If all my juice had an unpleasant chemical taste, I would want to know which of my ingredients was introducing the flavour.
First I would vape a few drops of vg, then the pg then I would mix a small nic base without flavours.
Then I would be mixing all my flavours as single flavours at different strengths.
You would then know where the bad flavour was coming from, whether it is comming from one or more of your ingredients or it is in your imagination.
Once you have made a bunch of single flavour mixes and found your prefered strength of flavour for these single flavours, you can make a bunch of flavour blends either mixed in bottles or just straight into your dripper a few drops of this that and the next thing as the next step in coming up with recipes that you like.