I know, my Acer is terrible for both those things lol. I'm told larger laptops aren't quite as bad for heat as the stuff inside isn't as tightly packed in, which is why I'm going for at least a 15.6'' this time
That almost won't make any difference --- Post updated --- I wholeheartedly recommend you laptops with any ryzen cpu, because amd's mobile processors are simply better (better heat manage, better performance and autonomy therefore)