There are 4 possible requirements for a tackle to be completed (it must be said that the laws are rather ambiguously written, the word "or" should appear between a and b, b and c, and c and d). Only one of them needs to be satisfied. I think you are suggesting all of them need to be satisfied but that is ludicrous. How many tackles are made where the tackled player's hand or arm never touch the ground? Hundreds every game. Does a player have to succumb, as in (c) to be tackled? Of course not.
The fourth possibility, (d), was met in this case. The player in possession was lying on the ground (how he got there is irrelevant) and an opponent's hand was on him. Under the laws of the game, that is a tackle. He should have got up and played the ball, which was what the defending team would have been expecting to happen. It was not even sent upstairs. It is very difficult to come up with any explanation other than the ref wanted Newcastle to get the first points. Even though it was (maybe) squared up later in the game they did get all the help in the early going, and were able to lead by 14 against a side that was pretty inept in the first half. As Old Panther suggested they could have led by more, but started dropping the pill regularly from the 20 minute mark, and conceding penalties as well. They lost because they could not hang onto the ball, and the opposition, with a resulting glut of possession, completely steamrolled them in the second half. The side's relatively poor fitness was quite starkly exposed.
I hope your side can win a lot more games this year. What will help that happen is cutting out the handling errors and getting the side's fitness to NRL standard. From what I saw in this game (and I know you beat the Raiders last week) the latter is the biggest problem facing the side.