Incorrect display of the drawn text on the screen

Question

I'm trying to draw text in 3d space, but it draws in wrong coordinates and not directed at the screen. As from here Text in 3D view linked to an object. It work correctly with modal, but did not with this class. How it look:

How it needed:

import bpy
import blf

from mathutils import Vector
from bpy_extras.view3d_utils import location_3d_to_region_2d

def view3d_find( return_area = False ):
    for area in bpy.context.window.screen.areas:
        if area.type == 'VIEW_3D':
            v3d = area.spaces[0]
            rv3d = v3d.region_3d
            for region in area.regions:
                if region.type == 'WINDOW':
                    if return_area: return region, rv3d, v3d, area
                    return region, rv3d, v3d
    return None, None

class DrawingClass:
    def __init__(self):
        self.handle = bpy.types.SpaceView3D.draw_handler_add(self.draw_text, (), 'WINDOW', 'POST_VIEW')
    
    def draw_text(self):
        font_id = 0    
      
        obj = bpy.context.active_object
#        v3d = bpy.context.space_data
#        rv3d = v3d.region_3d
#        region = bpy.context.region

        region, rv3d, v3d = view3d_find()
        
        pos = location_3d_to_region_2d(region, rv3d, obj.location)
        pos_x = pos[0]
        pos_y = pos[1]   
        
        # draw function
        blf.position(font_id, pos_x, pos_y, 0)
        blf.size(font_id, 20)
        blf.draw(font_id, obj.name)

    def remove_handle(self):
        bpy.types.SpaceView3D.draw_handler_remove(self.handle, 'WINDOW')

# to draw           
dns = bpy.app.driver_namespace
dns["dc"] = DrawingClass()

# to remove
dns = bpy.app.driver_namespace
dc = dns.get("dc")
dc.remove_handle()

Answer 1

Thanks to X Y, all I had to do was replace 'POST_VIEW' to 'POST_PIXEL'. Updated code:

import bpy
import blf

from bpy_extras.view3d_utils import location_3d_to_region_2d

class DrawingClass:
    def __init__(self):
        self.handle = bpy.types.SpaceView3D.draw_handler_add(self.draw_text, (), 'WINDOW', 'POST_PIXEL')
    
    def draw_text(self):
        font_id = 0    
      
        obj = bpy.context.active_object
        v3d = bpy.context.space_data
        rv3d = v3d.region_3d
        region = bpy.context.region
        
        pos = location_3d_to_region_2d(region, rv3d, obj.location)
        pos_x = pos[0]
        pos_y = pos[1]   
        
        # draw function
        blf.position(font_id, pos_x, pos_y, 0)
        blf.size(font_id, 20)
        blf.draw(font_id, obj.name)

    def remove_handle(self):
        bpy.types.SpaceView3D.draw_handler_remove(self.handle, 'WINDOW')

# to draw           
dns = bpy.app.driver_namespace
dns["dc"] = DrawingClass()

# to remove
dns = bpy.app.driver_namespace
dc = dns.get("dc")
dc.remove_handle()