Rotten_Mindhey there, can you explain what is net_maxroutable x;net_maxfragments x for and how to choose your value?
This is the maximum size a packet can be before it gets split up into smaller pieces. The default in the config should be fine and the most reliable for most users.
You'll probably need the lower value if you have a lowend router/network or WiFi that can't handle the larger packets and is thus losing them. However, keep in mind that on lossy WiFi connections, the increased split packets from the lower value might worsen the effects of packet loss if it's just a signal issue.
The larger value is to slightly reduce the amount of packets that need to be sent, for weaker CPUs that will largely benefit from less split packets. Also it can be used if you're absolutely certain everything on your route can handle the larger size.