Hello my packetloss goes high when i log into the game but in other servers my packet loss is low
In other servers the packetloss is equal, you just didn't notice it closely — if your packetloss is high in MCNR, then it is high on other servers as well. I know this because I've tried it and I've experienced such bad connection.
GtaFreak has explained it well up above, the packetloss is high when the WiFi connection is receiving some irregularities caused by your ISP.