Front axle pins left and right. Workshop does not find the cause.

Hello, I am the Jan and quite new here in the forum. I tried to read out a little bit about my problem here, but somehow it doesn’t get any further. It’s my front axle. With the reinforced abrassing and slanting curb it curls up at the front left. The culprit was quickly found, it’s the left track rod head on the outside, which is strongly knocked out. On the right side it doesn’t curl up when the brake is strong. If I drive over a depression for example, where the right wheel is temporarily relieved. So falls briefly into the depression / unevenness. I had this checked at the Opel specialist workshop and they only find the broken track rod head on the left. The right track rod head would be fine and the cross handlebars would not be damaged either. The coupling rods are stable. The dampers have also held up to the inspection of the workshop. The rubbers, which can be left and right nd left in the engine compartment does not have a great distance, look perfect. Long speech, short meaning, here must be a defect, which it is important to find out. Either the workshop has not properly checked right or I don’t know any further. Does someone have an idea about what the related to my description might be? Would I be very pleased about a few tips. Maybe you can do certain tests yourself to find the cause.