Which entails that there is some probability that the issue is network related since TQ has better hardware than SiSi, they are running approx. the same code, but they are located in different parts of the world. Since you are affected and not all players then the network issue would be located near you, somewhere on the path from your house to the nearest Cloudflare colocation (from where it is routed to TQ). We have seen this before where suddenly the path from certain ISPs to Cloudflare goes bonkers.
Please submit a support ticket to Customer Support and make sure to state your RL location, what ISP your are connecting through, what kind of network (wired vs wireless, ADSL vs fiber). Please send a traceroute from your local computer to tranquility.servers.eveonline.com and a SpeedTest to a nearby location with the ticket. Customer Support may be able to spot a pattern and figure out what ISP might having problems.