Just throwing those rough marks into an ATAR calculator is netting you a 69-70. Don't feel discouraged as there is still the final external exams which counts towards 50% of your final ATAR and if you still have trials to go, you can improve these ranks. Maybe drop 3U maths if its hindering your time allocation for other subjects, as it is better to focus on your 2U and especially English as those 2 units always count to your ATAR. Don't fret my friend, we will get through this together. Just work harder than you have ever before and you will see the 80 you need