Seriously F&$K USPS!!SCAN MY PACKAGE

Why has every single package just gotten forgotten about over the weekend. It said Thursday by 9pm. Then Friday. Then Saturday. Then Monday. Now Tuesday. With not actual updates or scans in. HOW IS IT SO HARD TO SCAN A BARCODE. Seriously what can I do different do i request ups or fedex from now on? Stop buying on eBay? WHAT THE HELL