I would expect the homework, number bonds, spelling lists to be given by the teacher according to the level the child is at that moment, rather than where the average child should be in the new curriculum.
It doesn't make sense to think that the child needs to know how to spell words like "afraid" when he cannot even read it or is still on pink books for example.
I'm sure DS1 could read and spell that word when he was in Y1, but he was almost at the end of the colour band books when he started Y1 and very soon became what some schools refer to as "free reader".
Also, if the child cannot even write his name, how can he be given homework where he needs to write sententes using the words from a list?
If you think the homework is too difficult and is having the opposite effect on your DS (making him hate learning), then have a word with the teacher.
By the way, when my son was learning number bonds in reception, we only played games using cards and dice (e.g. I got a card with 6 and the first one to say the number bond to 10 would win the card), and he loved it. He loved being "quicker" than me and getting most of the cards to himself. We used to play with superhero cards that had nice pictures on them and he was eager to collect his favourite ones.
There are lots of ways to practise number bonds that don't necessarily need to be boring and put off your child. At least that part of the homework can be a bit fun.
For spelling, if you have a tablet, there is a really good app called Squeebles where you can write your own list of spellings (using the ones you get from school), then the child practices them and at the end they get points to play a game using the squeebles. It's really good, and that's another way to improve the homework and make it a bit fun.