60% of any instance I enter is laggy (not ping spikes)

Since leaguestart, the majority of instances I enter are kinda laggy. At launch it was 250 ms, now it's about 120. I can reopen the instance a few times to "roll" a 12 ms one, then run that one, but that obviously doesn't really work with maps. The ping is somewhat stable (but high) for the entire instance.

On the gateway selection list, the ms is also pretty high. Past leagues its been 10-30ms, now it's 110.

Any fixes? Doesn't seem related to the ping spikes.

I've had 100+ ping for weeks on EU servers as far as i know there is no fix, i think it has something to do with bad server routing or something but i honestly don't know, i play on RU servers now its still 35 - 45 ping but its better then 100 - 250.

Yea, I checked the routing, and I am being routed through .atlas.cogentco.com nodes that account for all the added latency. When I have stable 14ms, I don't have that routing.

Seems like it's ISP's fault and not POE though? Haven't had this before in 10 years of playing, but I did get a new ISP.