I don't know what roughness scale is in C4D, but if it's 0-100, then your 80 may be too much, try to lower it to 40-60. Same goes for anisotropy amount, full anisotropy rarely gives good result. Generally, the rougher your material is, the less anisotropy amount it requires and vice versa.
Don't know how gradient acts in C4D, but in 3ds max some maps has gamma baked into them. Anisotropy requires linear values and no filtering at all. You may want to plug bitmap with radial gradient and see if it makes things to look better. Just make sure to load bitmap as linear. BTW, if you gonna make texture with gradient in photoshop, be aware that by default it doesn't produce linear gradient.
I would unplug bump texture untill anisotropy will be properly sorted out, just to be sure it won't interfere with anything.