Latency issues make game unplayable

I get frequent stuttering that occurs when there are latency lags. When I am in game and have a stretch of time when there is not high latency, if I click on my attack key, the Network latency bar goes into the hundreds. The lags are less frequent in the first few miniutes after I log into the game each day. After about 10-15 minutes of game play, the spikes get more frequent, last longer and have peaks that max out . They make the game unplayable. Re-starting the Instance, or the game, or trying different gateways do not resolve the issue. Trying the graphics settings changes resommended in various threads and YT videos do not change anything.

Specs: Ryzen 7-7700 X3D, RAM 64 GB; Radeon RX 6800 XT, 16 GB

In-Game Graphics Settings: Default

Internet Connection: Verizon DSL, EERO J010001 WIFI connection. I'm about a quarter mile from the switching station so that's about as good as you can get with DSL

HDMI cable plugged into the GPU

Drivers updated

Performance Graph: couldn't figure out how to embed a picture of the graph, so here is a link to the reddit thread where I posted it: https://www.reddit.com/r/pathofexile/comments/1hbf4hc/psa_pc_players_with_massive_network_spikes_heres/?sort=new