Battery draining even after recharging. Bought new battery but no better. Needing jump start every journey.

First Check charging rate of alternator and battery earth and main fuses ,does sound like a charging issue from your description of the fault,please update with findings ,Thanks

If car battery flat and needing charged after a short journey , there must be some amount of drain on battery . A large drain like that should be easily found with systematic checking .

I would go with a drain through the alternator for it to flatten the battery so quick, good way to check is fully charge battery disconnect alternator keep wires away from metal parts (insulate) connect battery lock car and leave overnight connect up see what happens when you start it , i have had this problem a few times and it has been the alternator.