It legitimately looked like a CW show. The natural lightning used by whoever took over as a DP after John Toll's departure didn't help at all. The "cheap-ness" was most notable when they used the slow motion bullet time effect in the scene with the Architect. It looked laughably bad.
The wire work during the Neo/Smith fight and when Neo & Trinity jumped from the building, looked horrendous.
The fights were badly choreographed, Morpheus was reduced to a comic relief (e.g the "drunkness" effect when he and Neo were trying to escape), there were cute-looking machines now in the real world?!
The music from Tykwer and Klimek was utterly forgettable, except when they used Don Davis' motifs from the first 3 films.
I can go on and on but overall - a disaster of a film, imo.