On the evening of the 19th APR there was a submarine optical cable cut around Bangladesh, this affected internet connectivity for some countries (AUS being one). To give a bit of context, connectivity now runs at ~300ms (vs 230ms), can hit ~430ms peak but it’s the packet loss that your seeing which is making it feel less responsive due to major backbone providers re-routing traffic via JP, HK and NA to reach EU, while existing SG-EU transit is getting hammered. There’s two major cuts…..
You could contact your ISP provider and see whether they can provide a work around. Some customers can use a VPN that might take an alternate path but YMMV. Provide an IP address that you hit in EU when using PRT to your ISP and they might be able to help.
Word has it mid-May as a fix, fingers crossed.
Good luck.