My pivot brushing keep cracking and breaking

I have to replace it every single week but the pivot cups gonna cracked or get pushed out (the tail pivot cup) and start falling appart when i start skating the next day even if it stay in place it will start cracking and falling out piece by piece ( the front) i just bought this skateboard for like 1 weeks and already have to replace it twice and now after replace it yesterday it started to break again im not familiar with this stuff i need some help im new so i do alot of manual i dont know what to do anymore

What kind of trucks /bushings are they? You can buy upgraded pivot cup bushings - but I can’t quite tell from your post: Are you saying the bushing is cracking or the pivot cup in the metal baseplate is cracking? Neither scenario is common - unless it’s a cracked baseplate that is chewing up the bushings? They might be old, brittle bushings. But provide some more detail and maybe someone has some insight