HTC One m9 marshmallow, blurry icons (edges not sharp)

[broli95]

Ok so since yesterday my phone is strange: first the vibration doesn't work perfectly and I have to send it to htc to have it checked ok but why do many games have the icons blurred/in low quality? In google play store the screenshots are not sharp and in perfect quality anymore, sometimes while watching some YouTube videos i see some texts in low quality, sometimes the images on chrome or Facebook are pixelated and finally many games are usually good looking but almost all the little icons of the games are a bit pixelated, the edges are not really sharp. This happens only inside other non default apps but why? The app drawer and gallery are perfect for example, strange :/