If its running v7, use a cake queue that should (hopefully) allow you to near fill the uplink, while also giving everything else in your network a bit of bandwidth rather than being starved out because of the fat upload.
V6, probably a pcq queue.
Ignore this, mine seems to handle this fine.
Another possibility:
Some special handling may be required if you have multiple public ip addresses on the router.
Yay, Thank youBut there is. You just have to go to PPP -> Profiles, and make a new one (or a copy of default)
/ip firewall nat
add action=masquerade chain=srcnat comment="wireguard: masquerade" \
out-interface=bridge src-address=192.168.100.0/24
/ip address
add address=10.2.0.2/30 interface=WG0 network=10.2.0.0