The problem with this club is clearly complex, and much of it is probably rooted in economy - both our own and that of our rivals in the PL.
1. Quality of players. We can't afford very good players. This has led us into having to fight to avoid relegation. This again affects the type of football we play, as players are less confident, buckle to some degree under the pressure, can't play relaxed, and hence can't perform at their best. Supporters start booing and it's all just a very bad spiral.
2. Tactic. I think Lambert has understood what the rest of us has understood; that our front three (when on form) represents the only consistent attacking threat we can offer. But our playing approach is so direct that our central midfield never get the "feel" of the game. If you don't routinely build play through your midfield they will eventually not look for poisitons, make the runs etc. And when they suddenly have the ball they will outside their comfort zone. Very bad habits form. Which makes it even worse as our defence-midfield link gets very Westwoodificated and predictable.
What we need is a manager who has the courage to let his players play with creativity and freedom. If these group of players are not good enough to do that now, they will only get worse playing like we are now.