I agree that “worship” these days often has the meaning of “give ultimate worth”, and, in that sense, Christians should only give ultimate worth to, or worship, the One Ultimate Being. But, surely, as a Catholic you know that “worship” also has a broader meaning of “reverence” or “respect” or “veneration”, such that English Bibles used to lump (and maybe some still do lump) latria, dulia, and hyperdulia all into one word “worship”.
Now, by arguing for “polytheism” as a partial description of the Abrahamic traditions, I’m not arguing that Abrahamists should, or do, give ultimate worth to any one other than the One Ultimate Being. But, it does seem clear that Abrahamists do give a degree of reverence, respect, and honor to, say, saints and angels. So, if one rejects using “polytheist” as a label for, say, Christianity, then the only fair thing would be to reject using the label of “polytheist” for, say, Hindus. I think, in fact, that that was your original point: that Hinduism should not be labeled “polytheist”.
Nicene Creed: “We believe in One God, the Father Almighty, maker of heaven and earth, of all that is seen and unseen…”
To say these words is to begin to enter into the mystery of unity with God through faith or belief. To believe IN God means to be, in a sense, IN his very being. Very similar to Hinduism. Perhaps exactly the same

. Saints though ‘venerated’, ‘revered’ and ‘respected’ cannot be fully that unity of indwelling presence. This is because as worshiped they are separate beings from God–even if, whilst worshiped, they have greater faith than we do because theirs is direct knowledge of God: they behold his presence in Heaven.
When we receive Eucharist, we become fully equal with the divinity in our Grace. Only, again unlike the Saints proper, we do not have yet manifested our immortal bodies of light in Heaven and so with the slightest impure thought however subtle in the mind or heart our Grace is lessened and we need constant communion through the Holy Apostolic Church via sacrament yet may still be regarded as in a state of Grace…
A Saint can no longer give us his/her body to eat and be nourished by. At least not that I’ve been told of…But Jesus’ the Lord can with the help of our priest who consecrates it.
It’s interesting that you bring up this point of veneration and connect it to Hinduism. It’s exactly where I knew you would be going. So my answer was pre-prepared and delivered without pretension I hope. The prayer to Saint Jude, the most Holy Apostle, and
servant and friend of Jesus’ says that Jude has the power to invoke a privilege. This privilege is the help of hopeless cases. It is done through the consolation and help of Heaven. This implies that Heaven is capable of communicating hope and giving help to the earthly. Whether under the directorship of God or not, Jude saves. I have experienced his salvation and testify to it. I need no other proof. But I know also that it was God’s Heaven that saved me.
You might think that I have backed myself into a wall or impossible route on trying to explain the Saints and their powers whilst explaining One Ultimate Being as singular and proof of their separate power.
Its really simple but requires a subtlety of thought. But I have received help while in a hopeless situation before. Thus the hopelessness of trying to reconcile fully what must wait for death of the concupiscent-body is not going to hinder me in the least.
The best thing for someone like me who has been in a lot of personal trouble is to regard all of Heaven as a unity with God as the king. John 15:5 expresses this mystery using the vine as imagery. “Apart from me, you can do nothing.”
True Christianity and the Roman Church especially in its sacraments represent a kind of technical implementation of the Eastern Philosophy if you choose to be of the bent that the Easter is the supreme way of seeing things. But it was done by God himself. Yet also by man, as Jesus’ was fully man. Thus, since we are fully men, we can co-create with God in these threads in as much as we can comprehend them as men. Only, ours will have inevitable waste material; for it is not ‘my’ words, but the Lord’s which are “spirit and life” to the highest degree.