Here is an interesting analysis from an Isreali point of view. Why we think that we are losing is beyond me. Do we have units surrounded and being destroyed or captured? Have we lost key terrain, or been denied freedom of movement? Is the enemy supported by a majority of the populace, and are they being supported materially by outsiders in a way that we cannot counter?
All of these answers are no. But somehow, the public seems to believe that we are losing, at least as reported in the polls. Of course a larger percentage believe that UFOs exist, but I haven't seen them either. The problem with arguing that public opinion polls should be driving our foreign policy, is that it places too much power in non elected opinion shapers, rather than actual facts or our duly elected leaders.