Brake not working

Hi, during this month, i felt that my brake pedal was taking a lot more pressure from me in order for the car to stop. i have fresh new brakes at the rear, but i don’t think its brakes because they were working not too long ago. yesterday, my car doesn’t even stop, i have to down shift and use the hand brake. i park my car at home and went back out in 1 hour and it got some pressure back. topped up the brake master resovior and it was kinda ok, at least it stops. i thought it needed to be blead, but before that, i got willx to come over to take a look, no leaks, so he took it for a drive and pumped the shit outa the brakes and now its fine. BUT, i need to pump it everyytime after i start the car to put it back to working order.

what could be the problem. master cylinder or brake booster? or just a simple bleeding?

i think your brake booster is messsed. i would replace that. they can be found anywhere and only takes little time to replace.