Even Gary Neville said there was no way this was a penalty, that says quite a lot. Although not sure this was the worst decision, there was also the free kick at the end of the match, where an English player (Stones? Not sure) pulled Aké down.....and got a free kick for doing so (followed by a yellow for Van Dijk who protested that decision, as he as captain should be allowed to do, the whole point is that captains can go to the referee instead of just everyone).
Not to mention several moments where an English player went down, grabbing his face or something, despite nothing really being hit (definitely not the face).
Oh well, the main problem was of course still that the team simply wasn't good enough and wasted the few chances they had. Like a very promising attack ending because a simple pass goes in between Simons and Dumfries and an Englishman picks it up