Hello, I have this below code,the CSV file is generating but not in proper format. How to generate the CSV file to show full list? 

public class UserService {
    private static String profileName = 'Chatter Free User';
    private static String ps7Name = 'Test Chatter Free7';
   
    private static List<String> ps1_ps10NameList = new List<String>{
        'Test Chatter Free1','Test Chatter Free2','Test Chatter Free3','Test Chatter Free4','Test Chatter Free5','Test Chatter Free6','Test Chatter Free7','Test Chatter Free8','Test Chatter Free9','Test Chatter Free10'};
    
    
    public static List<UserDetail> getUserPermissionDetails()

        Map<Id, User> userMap = new Map<Id, User>([SELECT Id
                                FROM User
                                WHERE Profile.Name = :profileName and Id IN (SELECT AssigneeId 
                                                 FROM PermissionSetAssignment
                                                 WHERE PermissionSet.label = :ps7Name and PermissionSet.IsOwnedByProfile =false)]);
        //System.debug(usermap);
     Map<Id, List<String>> permissionSetMap = new Map<Id, List<String>>();
        
        for(PermissionSetAssignment psa : [SELECT AssigneeId, PermissionSet.label
                                            FROM PermissionSetAssignment
                                            WHERE AssigneeId = : userMap.keySet()
                                              AND (PermissionSet.label IN :ps1_ps10NameList
                                                     OR PermissionSet.label NOT IN :ps1_ps10NameList)and PermissionSet.IsOwnedByProfile =false
                                            ORDER BY AssigneeId, PermissionSet.label])
        {
            List<String> tempList = new List<String>();
             if(permissionSetMap.containsKey(psa.AssigneeId))
                tempList = permissionSetMap.get(psa.AssigneeId);
            
            tempList.add(psa.PermissionSet.label);
            
            permissionSetMap.put(psa.AssigneeId, tempList);
                    
        }

        return evaluateUser(permissionSetMap);
        
    }
    
    
    private static List<UserDetail> evaluateUser(Map<Id, List<String>> permissionSetMap){

        Boolean additional;

    List<UserDetail> userDetailList = new List<UserDetail>();

        List<String> foundList = new List<String>();        
        for(Id id : permissionSetMap.keySet())
        {
      UserDetail ud = new UserDetail();
            additional = false;
            /*system.debug(permissionSetMap.get(id));*/
            foundList.clear();

            for(String str : permissionSetMap.get(id)){
            
                if(!ps1_ps10NameList.contains(str)){
                    additional = true;
                }else{
                    foundList.add(str);
                }
                /*system.debug(userDetailList);*/
            }            
            
            ud.Id = id;
            ud.permissionSetList = permissionSetMap.get(id);
            
            if(additional && ps1_ps10NameList.size() == foundList.size())
                ud.status = 'No Change And Additional';
            else if(additional && ps1_ps10NameList.size() != permissionSetMap.get(id).size())
                ud.status = 'Missing And Additional';
            else if(!additional && ps1_ps10NameList.size() != foundList.size())
                ud.status = 'Missing';
      else if(!additional && ps1_ps10NameList.size() == foundList.size())          
                ud.status = 'No Change';
                
            userDetailList.add(ud);
        }
        System.debug(JSON.serializePretty(userDetailList));
        
            return userDetailList;
       
       
    }
    
    public class UserDetail {
        
        public Id id;
        public List<String> permissionSetList;
        public String status;
    } 
    public static void createcsv(){
      List<UserDetail> theListReturnedFromMethod2 =getUserPermissionDetails(); 
        String req = json.serialize(theListReturnedFromMethod2);
        Blob csvBlob = blob.valueOf(req);
        String csvname='Persona Report'+'.xls';
        Document doc= new document();
        doc.name=csvname;
        doc.folderId=[Select Id, Name from Folder where Name='Persona'].Id;
        doc.body=csvBlob;
        doc.description='Persona';
        insert doc;
    
    }
    
}