API process overly complicated and excessive redundancy

[cweitat]

• API has alot of redundancy in information that is not needed such as attributes and heavily encapuslated within sub objects
  
  Payment method details even on the page of browsing events

• excessively complicated request to CRUD
  

It's the backend job to parse the way they prefer; not make frontend to parse the way backend prefers.
FE should not be bearing the load of extracting information

• Inconsistency usage of API headers resulting in a FE redundnacy code as mentioned here API headers not standardised #8974

• Unhelpful Response for API
  
  Nobody needs to know the relations between each item; it has NO use cases at all

• Outdated documentation
  APIs that were used are not documented at all