huge latency on server 1.14.4

hello , i created a world with my friends and we experience a lot of latency with the server.

we are 4 maximum connected at the same on the server . the logs says it is possibly overloading but i can't seem to find why .

here are the logs : https://mclo.gs/y1E1MC9

thanks to all of you who will help me !

thanks i'll try !