OW2 high ping, came up suddenly. Out of nowhere. above 300

Hello. Out of nowhere, about 3 days ago my overwatch “broke” and my minimum ping is 300. Goes up to 1600 depends on the time of day. I have high end PC built 2 weeks ago, my internet is 400mb/s fibre. Every game I play is at 15-25 ping, my speedtest shows me ping of 2. Since battlenet support does not exist I come here asking you guys for help. There is no way to fix it. Game worked properly for the first 1,5 weeks after building the PC, suddenly broke latency-wise. Restarted router, flushed dns, renewed ip, checked integrity 5 times, NOTHING helps. Game is unplayable even in training area with bots. PLEASE HELP.

My graph shows:
SIM: 7ms
IND 53ms
LAT 42ms
PNG 280
RTT 280
CMDQ 21
PPS incoming 21%
PPS coming out 64%
loss incoming 0%
loss coming out 0%

Been having this exact same problem ever since the new season. Have literally tried everything you have and also did a complete windows wipe and install…nothing. I’ve given up trying to fix it