MBPro Touch Bar 15'' - 2016 display issue, flickering with horizontal lines

My MBPro Touch Bar 15'' - 2016 display, when I use it continuously more than half or an hour, starts flickering with horizontal lines. The same issue with an external monitor, so I can't work with it. But it's brand new!!! I've used it very few times in the last years because I was working on my other older Mac. I performed hardware test and everything seems to be ok... but it isn't. It is the second time that I bought a Mac Book Pro and I discover years later that has a graphic card issue: my previous MBP was the 2010 model 15'': same history!! Only a couple of year later I discovered a switch graphic card issue (but I solved more or less it with an independent software patch). And now? Any suggestion for my issue? I have to give up and never buy an expensive mac book again ?

Thanks to everyone who will reply me.