To try to lower the lag, try to lower your render distance to the size of the map, or at minimum. Also another thing is, that CubeCraft has a lot of new players coming because of more fun games to play. In Bedrock Edition, before BlockWars Bridges , I saw that 20,000 people were usually online. Now there is 20,000 - 40,000 people online! So that could answer your question.