Darren Moore refused to point the finger of blame despite individual errors costing the Baggies dear in the 3-2 defeat to Middlesbrough.
Gareth Barry's mistake led to the visitors taking the lead in the 17th minute. But Albion battled back and took the lead with goals either side of half time from Jay Rodriguez and Dwight Gayle.
But back came Middlesbrough with sub Britt Assombalonga scoring twice - the second from a mis-kick from Chris Brunt to give visiting boss Tony Pulis three points on his return to The Hawthorns.
"Obviously to be 2-1 up with about 15 minutes to go, we are disappointed to lose the game having got our noses in front but that's football and you have to be switched-on to every situation," said Albion head coach Darren Moore.
"They changed their system and threw players on and the gamble paid off for them. It feels raw now but it can't stop us in terms of what we have built so far and it's important that we learn from it.
"I won't look at individuals because we score as a team and concede as a team. We have to stay together and make sure we don't let it repeat itself.
"Teams come here, get players behind the ball and frustrate us; we aren't going to be given anything on a plate. It's up to us to find ways to win."