We tried this from our side and the buttons look okay. It does however look pixelated on the pics you sent. Do the pictures represent the exact same "fuzziness" as what's displayed on your device, or is it more/less? Do both your devices show the same thing?
Also, make sure to perform a quick reinstall to see if it makes a difference.
Can you also point out/highlight on the screenshots where exactly on the buttons it's fuzzy, and what's expected?