... the VG ... doesn't provide much vapor, while the PG tastes bad but provides an awesome amount of vapor ...
I'm going to echo glassmanoak for the most part. Something is very, very, wrong. It is possible your PG is PG400 (Polyethylene Glycol). PG400 is supposedly safer than regular PG, but has a stale taste. I have not been able to find anyone who uses PG400 (on purpose). If your PG is actually PG400, it is completely safe and may be salvaged with the right flavor.
As far as your VG not providing much vapor, that is extremely suspect. I would trash this immediately. Even though it "has a pleasant sweet taste," it does not act the way VG should.
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