DELL U2718Q

[idle4you]

Problem with DELL U2718Q monitor.
Connected via DisplayPort-MiniDP cable.
After the parameters are generated by the script, the image on the screen looks flattened (I manually specify the following resolutions: 7680x4320 3840x2160 2560x1440 1920x1080 1280x720)...

user@CWS-R-C02C50GMPN5T . % sudo /Users/user/Downloads/one-key-hidpi-master/hidpi.command
Password:
  _    _   _____   _____    _____    _____ 
 | |  | | |_   _| |  __ \  |  __ \  |_   _|
 | |__| |   | |   | |  | | | |__) |   | |  
 |  __  |   | |   | |  | | |  ___/    | |  
 | |  | |  _| |_  | |__| | | |       _| |_ 
 |_|  |_| |_____| |_____/  |_|      |_____|
                                           
============================================

(1) Enable HIDPI
(2) Enable HIDPI (with EDID)
(3) Disable HIDPI

Enter your choice [1~3]: 2

-------------------------------------
|********** Display Icon ***********|
-------------------------------------

(1) iMac
(2) MacBook
(3) MacBook Pro
(4) LG Display
(5) Pro Display XDR
(6) Do not change

Enter your choice [1~6]: 6

------------------------------------------
|********** resolution config ***********|
------------------------------------------
(1) 1920x1080 Display
(2) 1920x1080 Display (use 1424x802, fix underscaled after sleep)
(3) 1920x1200 Display
(4) 2560x1440 Display
(5) 3000x2000 Display
(6) Manual input resolution

Enter your choice: 6
Enter the HIDPI resolution, separated by a space，like this: 1680x945 1600x900 1440x810
:7680x4320 3840x2160 2560x1440 1920x1080 1280x720
Enabled, please reboot.
Rebooting the logo for the first time will become huge, then it will not be.
user@CWS-R-C02C50GMPN5T . % 

In this case, the monitor settings in the system are shown as follows:

What am I doing wrong? How can I force Mac OS to display an image that is not flattened?