Ethernet Slow Download

[Er0l]

Using dietpi with speed limited to 100Mbit with ethtool and autonegotiation off:

iperf -t 60 -c 192.168.254.1 -d
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 192.168.254.1, TCP port 5001
TCP window size: 45.1 KByte (default)
------------------------------------------------------------
[ 5] local 192.168.254.2 port 38468 connected with 192.168.254.1 port 5001
[ 4] local 192.168.254.2 port 5001 connected with 192.168.254.1 port 36066
[ ID] Interval Transfer Bandwidth
[ 5] 0.0-60.0 sec 442 MBytes 61.8 Mbits/sec
[ 4] 0.0-63.7 sec 7.75 MBytes 1.02 Mbits/sec

Upload results are awful.

Is there any help for this?

Also 2GB model here with Gigabit connection.