Solved! Go to Solution.
When images are sent over WhatsApp, the images tend to get blurrier due to the app compressing the image which in turn reduces the quality of the image. It's not always evident with a normal picture, but when you screenshot an image and use the 'Scroll capture' feature to capture more than the standard screenshot, it will get more blurry when sent. So, the longer the screenshot, the blurrier the image. What you can do instead is to take multiple screenshots and send these over.
So then what's the point of the scroll capture if you can't send it with good quality?