Hello.
1 Ccr1036-12G-4S - server
2 RB2011UAS - client
Create Wireguard with default settings, MTU - 1420.
If check Tools/Speed test
Ping from 2 to 1 - 112/115/167
jitter 4/4.2/5
Loss 0
tcp Download 30.7MB
tcp upload 48MB
udp upload 44MB
Cpu - 3-6%
But If copy some files - speed 370Kbs 
All win client are 1Gbs. Inet 100Mbs
Torrent download ~ 9-10 Mb per s
how to improve speed in Wireguard?
Thanx.