Poorva Express: हुगली सी बहती तेरी चाल है पूर्वा तू बेमिसाल है - Keshav Singh

Traveled yesterday from Jaipur to Gurugram some observation i made during the journey.......
1.) Since it was Sunday evening Train was jam packed between Jaipur and Delhi.
2.) Despite Being Shatabdi it never went above 105 kmph and most of the time train was traveling at a speed between 100-105 kmph.
3.) Train was before at Jaipur then it followed a series...
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of late arrival at Bandikui , Alwar , Rewari and Gurugram.
4.) This train use to touch 110 kmph earlier but is there any reason behind decrease of mps in the down direction ?
5.) Reached 30 mins late at Gurugram , 15 - 20 min late has become a regular affair for this train now.... Disappointing how IR is treating its one of the most prestigious train.
6.) Traveled on Pooja Express on Saturday between Gurugram to Jaipur was surprised to observe that the train which was mostly doing around 100 kmph in Gurugram - Rewari Section actually over speeded between Bandikui and Jaipur. Train was comfortably doing around 115 kmph (Screen Shot for reference). Pooja was late by 30 mins at Gurugram and reached around 10:40 at Jaipur. Shatabdi covered and caught pooja at Jaipur station by reaching 10 mins late... so i am assuming it also does 110-115 kmph in New Delhi - Jaipur direction.. now the question arises why is there such difference between up and down mps on this section???
Regards