Awful connectivity for the past couple of weeks, especially after 7pm

Soo, this is starting to get pretty bad. Every day I get awful connectivity issues, with speeds dropping to as low as 0.25 Mbps for my 16/3 package. What is going on? This is the time of day when I actually need my connection to work, and this is when it just bails on me. If it's not download speed it's either high latency or package loss (or both).

Here are some tests I ran just now:

 

I ran tracert and the latency to my first hop is < 10ms, usually around 1-3ms. The problem is most likely not local, especially since it tends to happen at certain times every day as well.