High tps lag caused by neruina. I know its not neruina specifically, but unable to track what is causing it through the spark profiler. https://spark.lucko.me/1OouJjMvhI

You have only 3.5gb of memory allocated to your server, there are 10 players and ~1300 entities loaded, 760 in the nether and 650 in the overworld, no mod stands out as a culprit for lag. Your system is simply just chugging as it’s trying to do too much.