It is great that you've found a workaround by using two different network, this can be helpful tip for others experiencing same issues.
Network problems sometimes can be more frustrating, especially when it about slow loading just as you have said switching to a different network or using an mobile app which can sometimes resolve the issue.
Having a second ISP is a solution, but it's worth noting that sometimes unexpected network problems can come at a bad time. By bad timing, I mean when you have a strong pocket pair but can't do anything about it and end up going to sit out because, at that point, there are freezes and lags due to network problems.