Pretty sure there are many reasons this is the case. High influx and abnormally high active users is even hard for large websites to manage properly. I know a lot of the instance owners are working tirelessly to update and manage the extra traffic.

That being said I know virtually nothing about how this all works but from what I understand even if you were to join a low latency instance that has less users you would need to still “speak” with the higher traffic instances for any content posted there. So you would still have the same issues on most content.

Someone more knowledgeable should correct me where I am wrong because I certainly might be.