Gurm If you feel up to it, on your older version you can make note of chrome://gpu and chrome://flags and then if you update to the newer version, compare the two again to see what is different. If it's a switch, then it should theoretically go back.
That said, why is Chrome popular? I find on a PC that Firefox is just fine (I am actually on Waterfox 56.0.1 and quite happy with it). It smooth scrolls better than Chrome, and generally all-around feels more comfortable to use.
On an Android device, yeah I agree, Chrome is what you need to use for smooth scrolling.. got the ghastly 69 interface, all blindingly white and junk. Rolled it back to 68.