Blurry picture quality in forum posting and reply due to bad server-side resizing

Bad picture quality in forum posting and reply due to bad server-side resizing.
It resizes to lower resolution but actually the size is bigger than original.

For example, my post iRule to Force Source IP to Specific Backend Node | DevCentral

It loads server resized 855 bytes picture from url:
https://community.f5.com/t5/s/zihoc95639/images/bS0zMzg5OTUtYmV3OXgz?image-dimensions=750x750&revision=1

Meanwhile, the unresized picture (higher resolution) are actually only 850 bytes:
https://community.f5.com/t5/s/zihoc95639/images/bS0zMzg5OTUtYmV3OXgz

I suggest dont use server-side resizing.
Let resizing done by browser.