Alexis Mac Allister and Harvey Elliott reacted in similar ways after the final whistle against Manchester United yesterday. Sometimes you don’t always get what you want. Football is perhaps the best teacher of that reality. Life can be cruel, people are fallible and make mistakes. Yesterday, all of that was true for Liverpool. No matter how hard the Reds tried, they just couldn’t finish off their chances. And they struggled to be solid enough to contain Manchester United’s counter attacks at the other end. Those errors cost Liverpool. Although it could have cost them even more if it wasn’t tha…