Low speed measurement results with QUIC protocol comparing to HTTP/2 protocol

### Please answer the following questions for yourself before submitting an issue.

- [x] I checked the [knowledge base](https://adguard-vpn.com/kb/) and found no answer
- [x] I checked to make sure that this issue has not already been filed

### AdGuard VPN version

2.7.0

### Environment

```markdown
- OS: windows 11,24h2
- Other network-level software:
```

### Which DNS server do you use?

Custom DNS

### Custom DNS

_No response_

### Use Wintun

- [ ] yes, I do

### Issue Details

Steps to reproduce:
1. Select quic protocol in adguard vpn
2. Do speed test
3. Compare to http2 protocol

### Expected Behavior

Quic I assume would be faster

### Actual Behavior

Http2 is faster

### Screenshots

QUIC

http/2

### Additional Information

_No response_