I understand the images you uploaded are a bit blurry. Our system does apply some moderate optimization to images to reduce the file size. Another solution is to embed the image/gif as HTML (using the HTML block) rather than uploading it using our + menu.
We know that this is not ideal and our engineering team is working on a permanent in app fix for this. We do not have a specific time table as when the fix will be shipped, but it is something that we are currently working on.