Thanks for the feedback.nuclearcat wrote192.168.99.1 is BRAS on THGV side, so problem is between your modem and BRAS. Between BRAS and you following possible congestion points:
1)DSL modem (check link speed, might be speed dropping due noise, or might be some upload flood, i hope you modem have necessary counters)
2)Ogero network (prone to have congestion, especially at specific centrales)
3)THGV network (i have plenty of capacity there and monitoring this part)
4)BRAS load (also being monitored, lot of free CPU)
If you can tell me centrale, i will ask support if they have similar complaints, so we can ask Ogero to fix it.
1)I checked the link speed several times, download is always 6 - 7.5mbps and upload 700 - 900kbps, while ping is still fluctuating a lot to 192.168.99.1 so i'm sure it's not an issue from link speed. Also I tried disabling internet on all devices except main computer, speed was full and ping issue was still there.
2) Most likely I believe it's Ogero network, I belong to Mansourieh centrale (I live right under the baladiyye). I guess I can call thgv support tomorrow
Thanks for the help : )