Fuzzy fonts in external monitor (Dell) I recently switched to using Macbook Pro  MacBook Pro (Retina, 15-inch, Mid 2015) and it is running MacOS High Sierra verison 10.13.6 . 
When I connect it to an external monitor (DELL U2414H) I notice that font display is grainy and fuzzy, as shown in this screenshot: 

I am connecting to the external monitor via HDMI. I see similar display when I connect to the external monitor using Displayport.

I searched through the forums and I tried below approaches:


forcing to RGB mode as explained here: https://www.mathewinkson.com/2013/03/force-rgb-mode-in-mac-os-x-to-fix-the-picture-quality-of-an-external-monitor.  
enabling/disabling _LCD Font Smoothing
Setting various values to AppleFontSmoothing 
(i.e. running the command defaults write -g AppleFontSmoothing 2)
Restart the machine multiple times, resetting NVRAM and SMC settings
Open the app in low resolution mode


But none of these steps helped, and fonts on my external display still appear fuzzy. I understand that in the external monitor the fonts can't appear as crisp they are on built in display. But I didn't expect the fonts to appear fuzzy on the external monitor. FWIW I was using a Macbook with out retina display prior to switching to this model, and didn't had any issues with display of fonts in the external monitor as I am currently facing.

Is there a solution to make the fonts to appear without any fuzziness apart from buying a new external monitor ?
This is the solution, It really worked for my 1920x1200 old monitor 

Just follow the steps I made, because original receipt has some inaccuracies