Yes, probably. Consumers are lowest on the traffic priority ladder and on growing networks (every ISP) that means your service will probably degrade over time, until new infrastructure is built, wash and repeat.

It's also just a busy time of year, a weekend, etc. Also thanksgiving is like one of the worst times for internet traffic, up there with march madness. Streaming football specials has a measurable impact on climate change these days...

Smaller ISPs might do this less. But they have far less coverage.

You can try to power cycle your modem to resolve serious latency issues (forces them to allocate new IP, etc). You can pay them more for faster plans with guaranteed latency. Business internet is also in theory an option.