I feel the same right now. Just like my intuition was telling me we would be parking the bus against Sevilla and would probably produce some horrible football, my expectations for this game are similar, considering Herrera is injured for around a month, if not more.
I see us setting up to play 3-5-2 to negate Chelsea's system and get protection on the wings.
The Sevilla game was a 2 leg game. It was the away leg.
Furthermore, that was a knock out competition.
Today's game is not a knockout.
Today's game is at home.
Before the Sevilla game, I knew 0-0 is what we were aiming for, given that Sevilla are pretty much unbeatable at home.
CFC, on the other hand are not unbeatable at Old Trafford.
Too much negativity in here and it makes me wonder why some of you even bother following MUFC or football.
For the record I am very happy with how we are doing. After 3-4 years of being poor, we are finally ready to finish in the top 2 and back in the CL (past group stages). We have a great manager in charge, who is putting together a young squad which will do very very well in years to come. After winning 2 trophies last season, I can see Jose winning us plenty more trophies in the next 5-10 years and it's going to be glorious.
Off-topic
If something makes you so unhappy or depressed, for your own health it's best to stop doing it...and that includes watching MUFC.
For example, when we lose or play badly, I will avoid reading the newspapers, internet articles or watching Match of the Day (on TV). When we win, I will read many articles and maybe watch MOTD, as it makes me happy.
The same applies for hobbies/interests/people - avoid the ones which make you unhappy/depressed.