Really bad ping to Mihoyo Game servers

My ping to Mihoyo (Genshin Impact, Honkai: Star Rail, Zenless Zone Zero) servers went from 30ms to 120-150ms since 1 month ago. My friends who are with another provider have no problems. I already restarted the modem/router and it did not fix the problem. Using a VPN fix the routing issue but this is not a solution. From what I've seen from other Videotron users, I am not the only one with the same problem. I messaged support on Twitter and they said not our problem and closed the ticket. If the problem is not on their side then why does the other ISP have no issues. This had been going on for a month!