The key to this is a helpful Husband. Leave him to scrub and take any frustrations on the shelving. He ask If I am happy with them, I say I am if you are. Don't look at the shelves too closely or criticise! Otherwise the husband's willing help melts like a snowman in a blast furnace.
Always protect the bottom of the oven with a silicon oven saver, definitely worth the money and saves untold effort. Have stay clean sides to your oven if you can.
And this is the old bicarbonate, vinegar and dish soap trick for the door. Just do it the day after roasting, or even better as the oven is cooling the same day.
Put a dessert spoon full of bicarbonate on the pull down door. A small squirt of dish soap on a green scrubby still hot from the dishwater. Give it all a good scrub round to loosen off what you can. Then lay four paper dish cloths over the glass. Wet the sponge with the vinegar and pat it all over the paper towels.
Go make a cup of tea and play with the dog. Come back later, use the paper towels to scrub off anything else. Wipe it all down with a wet cloth. Any burnt on grime probably means dismantling the door, so do this before it gets too bad. I find dismantling the door entirely every couple of months is enough.
I can honestly see why people microwave food in plastic containers as cleaning the oven is not my favourite either. I just hate microwaved food. It tastes awful to me.