This week I got installed version 10 firmware update, after which lagging and freezing has gone. But I am still in process of loading apps, so far I have added three apps Torque Pro, Digi HUD Pro and Sygic (paid version) and it is working fine. The paid version is linked with an online account so you get all your saved locations across all devices, plus it is a better interface and updated map.
Check the version of your infotainment.
Cameras quality is very poor. So IMC must recall this unit instead of doing just patch work.