If Sanchez didn't make mistake, Chelsea should've won this match. Hojlund wasn't in a good position to shot, even if he shot, there was James can block it, but Sanchez forced himself without thinking about the consequence.
Chelsea and Manchester United have reasons to feel disappointed by having only one point in this match. They both had chances to win it and a draw is not their wanted result at beginning. Both of them wanted to have three points to improve their ranks in Premier League and 1 point is not good result for them, even it's a big clash.
Make sure people shouldn't ask to sack Amorim when he didn't bring good results during his first season. It requires process and consistency, like Pochettino need a year to transform Chelsea.
Don't expect to much for Manchester United in this season, as long as they're not relegated, they're fine.
Manchester United fans have learned to be more patiently and calm in the last 10 years, with many coaches and results are worse season by season. If they can give Ten Hag three seasons to do his job, perhaps they will be patiently enough for more than 1 season with Amorim.
Pochettino was treated unfairly in Chelsea and I have same thinking like you, if Pochettino was give more time, he would have transformed Chelsea much better, but luckily for Chelsea because Maresca is doing his management job well too.