Gnome dash to dock extension minimize when you click, instead of shift+click
In Tweak Tool > Extensions > Dash to Dock > [little gear icon settings thing] > Behaviour, you can customise what the Click and Shift+Click actions do for any icon in the dock.
goto tweak tool -> extensions -> dash to dock , press the gear icon -> goto behavior tab -> there is something called 'click action' with a drop down menu and gear icon -> change the drop down menu action from 'cycle through windows' to 'minimize'.
Done. :)