Delay when loading nether

I encountered a problem loading the nether, when I entered the portal (for the 2nd attempt) I spent around 5/6 minutes on the loading screen and then the nether loaded, but it seemed like I was on a server with a weak connection, a block was broken and no particles came out, I hit a mob and didn't do any damage, only after a few minutes when it came back and didn't come back 100% I still seemed to be lagging. So I left the world, when I went to enter, there was a slow opening, something that didn't happen in the Overworld. Please fix this urgently, how can I beat the game without the Nether?