Heavy Lag for people joining my games

Hello!

My internet is fine. I live in London, up and down speeds are great, no issues.

I can join other players games no problem, no lag, no issues.

BUT.. Everyone who joins my hosted game complains of heavy, unplayable lag? Literally everyone. I am playing fine with no lag.

Any ideas? Router settings or ISP setting or something? I can't work it out

What time of day do you play? Are people who join you in your geographic locality? The player base is quite small currently.

I have played with peole recently where the lag was unreal (excuse the pun)

Various times, day and night. That could account for some of it, but its literally every single player in every game that complains. I dont think its that.

A huge issue in some P2P games is that if the host's computer is bad, no matter how good the internet is, it can't process the data fast enough. If your PC is "bad", that might be why