SBC - Kranti Veera Sangolli Rayanna Bengaluru: Station in Garden - Dinesh Kumar

I travelled between Mumbai CSMT to Gadag on 1st April 2021 that is Yesterday during which I am sharing my experience below...
Train was running like slow local from CSMT to Lonaval with less speed and train coach is like so much shaking..
After Lonavala it catch the little more speed until Daund but after Daund upto Solapur it's horrible that Train jumping so like in toilet any senior citizen can fall easily. I never belive Daund solapur part of golden quadrilateral route is such worst line but later I...
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thought it might be due to 3AC coach suspension problem but when I cross Solapur the train started running smoothly without any jumps.. Even when entered SWR in Hotgi Gadag Branch line train speed increased and same time it was running smoothly on tracks like how I experience between Guntakal Ballari Hubli route.. I don't know Solapur Daund stretch is such low strength track comparing to Branch line Hotgi Bijapur in comparison to Speed and quality of strength to withstand speeds without jumps..
Please any local RF of Solapur Daund can put light on this my observation and if I am wrong let me know what is true.