Furman's Italian Style Tomatoes
Italian style likely just means Roma (plum) tomatoes.  It's a marketing ploy since there are lots of different types of tomatoes in Italy and no one 'style'.

Roma tomatoes (along with most other types) grown without proper plant nutrition, and limited sun can be especially bland if picked early as well.  They don't have to add anything to make them bland.  Keep in mind that tomatoes have a lot of water (like watermelons) and can easily end up bland if they're just given chemical fertilizer and water.

Try different brands.  Even San Marzanos can be fake (about 2/3 of the export is fake) but they'll still taste better.