Chinese taking over buy boxes

Hi all, so what I have noticed recently that amazon is granting buy box to the sellers that have the lowest price and it does not matter the shipping times. Been on a listing and these to chinese hoped on completely destroying any competition. Price was 8.99 for the item the have cut the price 50% .I’m doing fba myself, and these sellers have crappy seller ratings 60-65% and delivery date is january 5-15. I have lowered the price to £0.50 difference and still I could not get the buy box… just unbelievable. Algorithm just gives the buybox to the lowest price seller and it does not matter when its gonna get delivered and who’s sending it, when you click on the storefronts you can see half of the reviews saying items never delivered. Every day there’s something new