All cars serve a variety of purposes for their users. Just because it doesn't suit your needs or circumstances doesn't make it a bad vehicle.
I was on the verge of buying one because of the following factors when I was planning on only running one car in my household:
The school run and daily travel requirements were well within the battery range;
The boot accommodated my 2 large dogs which I take in it daily for their walks;
The I.C. engine permitted uncomplicated longer journeys;
The towing capacity enabled me to pull my caravan when going on holiday;
The 4 wheel drive capability enabled traction on grassed surfaces when required.
Mitsubishi are upfront on their presentation of the economy issues. The "breakeven point" where the diesel version becomes more economical than the PHEV version is on distances in excess of 106 miles. 90+% of my driving made the battery range acceptable and very economical.
In the end I opted to go down a 2nd car route and bought a pre-owned Leaf. The Passat Alltrack will now experience significantly less use, but provide the versatility and second vehicle option when required.