why virmach has the worse networking

I got the special offer from virmach with a 2C/2G VPS for just 15.5 USD/y.

I heard virmach has good networking for their products. But from what I tested, the networks are really bad.

 Fri 13 Jan 2023 08:58:36 PM HKT
   
 Basic System Information:
 ---------------------------------
 Uptime     : 19 days, 11 hours, 34 minutes
 Processor  : AMD Ryzen 9 3900X 12-Core Processor
 CPU cores  : 2 @ 3799.996 MHz
 AES-NI     : ✔ Enabled
 VM-x/AMD-V : ✔ Enabled
 RAM        : 1.9 GiB
 Swap       : 512.0 MiB
 Disk       : 24.3 GiB
 Distro     : Ubuntu 20.04.5 LTS
 Kernel     : 5.4.0-135-generic
   
 fio Disk Speed Tests (Mixed R/W 50/50):
 ---------------------------------
 Block Size | 4k            (IOPS) | 64k           (IOPS)
   ------   | ---            ----  | ----           ---- 
 Read       | 272.42 MB/s  (68.1k) | 167.23 MB/s   (2.6k)
 Write      | 273.14 MB/s  (68.2k) | 168.11 MB/s   (2.6k)
 Total      | 545.56 MB/s (136.3k) | 335.35 MB/s   (5.2k)
            |                      |                     
 Block Size | 512k          (IOPS) | 1m            (IOPS)
   ------   | ---            ----  | ----           ---- 
 Read       | 768.28 MB/s   (1.5k) | 1.04 GB/s     (1.0k)
 Write      | 809.11 MB/s   (1.5k) | 1.11 GB/s     (1.0k)
 Total      | 1.57 GB/s     (3.0k) | 2.15 GB/s     (2.1k)
   
 iperf3 Network Speed Tests (IPv4):
 ---------------------------------
 Provider        | Location (Link)           | Send Speed      | Recv Speed      | Ping           
 -----           | -----                     | ----            | ----            | ----           
 Clouvider       | London, UK (10G)          | 53.4 Mbits/sec  | 56.4 Mbits/sec  | 155 ms         
 Scaleway        | Paris, FR (10G)           | busy            | busy            | 152 ms         
 NovoServe       | North Holland, NL (40G)   | 51.5 Mbits/sec  | 75.2 Mbits/sec  | 152 ms         
 Uztelecom       | Tashkent, UZ (10G)        | 50.9 Mbits/sec  | 2.39 Mbits/sec  | 240 ms         
 Clouvider       | NYC, NY, US (10G)         | 71.3 Mbits/sec  | 70.5 Mbits/sec  | 84.7 ms        
 Clouvider       | Dallas, TX, US (10G)      | 73.5 Mbits/sec  | 73.2 Mbits/sec  | 38.1 ms        
 Clouvider       | Los Angeles, CA, US (10G) | 75.1 Mbits/sec  | 78.2 Mbits/sec  | 10.7 ms        
   
 Geekbench 5 Benchmark Test:
 ---------------------------------
 Test            | Value                         
                 |                               
 Single Core     | 1017                          
 Multi Core      | 1828                          
 Full Test       | https://browser.geekbench.com/v5/cpu/19862714

As you see they have good disk IO, and great CPU power. But both network sending speed and receiving speed are worse.

How to improve this? maybe by a ticket? But I heard that virmach just ignores the tickets for their BF products.

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