Blues avoided a third straight defeat after Curtis Davies cancelled out Tom Ince's opener for the hosts and could have claimed all three points had not the Peter Lovenkrands hit the bar.
"We didn't cause them enough problems, we didn't deal with the pitch," said Clark, whose comments on the pitch were echoed by Blackpool boss Michael Appleton.
"We didn't manage the pitch because the pitch was difficult for both teams. Blackpool did the right thing in the first half.
"Overall the attitude and application and defensive side of the game for the full game I was happy with.
"The attacking side was a big improvement in the second half. We had to cause them more problems because we hadn't caused them any problems in the first half.
"The state of the pitch is unfortunate for both teams because I think there are lots of good footballers on both teams."