Problems on my tablet when I updated to Lollipop

Ever since I updated my Nexus 7 2012 to Android Lollipop, I experienced a lot of problems like heating up when I use the tablet, Fast battery draining and slow battery charging, malfunctions like the tablet will just press the screen on its own , the tablet will slow down and freeze and when I put it to sleep mode, the tablet won't wake up unless I long press the power button and restart it. It's like it's ignoring me from wakinv it up. Are there any solutions that I can do aside from factory resetting it (I already resetted it twice) and taking it to a shop to fix it? Hoping for your considerable answers. Thanks!