I play a lot of rocket league which is extremely fast paced and latency matters a great deal. Since December 2020 I've had extremely horrible latency issues. At first I thought it might have been my wifi card as it was a new card so I bought a ethernet cable and ran that to my router from my pc but the latency persisted. It peaks at insanely high latency i.e. well over 1 second spikes regularly which during a fast paced game ruins the experience.
I have a BQM here and comparing it to others I have seen mine looks like the Himalayas in comparison.... https://www.thinkbroadband.com/broadband/monitoring/quality/share/67a050e853577d6dbdbbcefc27e7b88322...
Bearing in mind this graph is a good day... The average latency peaks up to the top of the graph some days regularly.