I’m just talking out of my rear end here, but I think that hops are essential in order for beer to taste like ‘beer’. In large (or even not so large) quantities they impart more or less bitterness to the beer, but I think you need *some *hops to give the brew a ‘beer flavor’; without hops at all it just doesn’t taste like beer.
And to address the OP, there are quite a few beers, as you’ve already discovered, that are *not *bitter. They still have hops because ‘hops=beer’, but without the unpleasant (to you) bitterness that’s associated with larger quantities.