timeout errors

[pemull4]

from Proxy provider I am getting socks5 proxies:
socks5h://user-xxxxxxxxxx-session-1-sessionduration-60-country-de:passwordyyyyyyyyy@gate.decodo.com:7000
socks5h://user-xxxxxxxxxx-session-2-sessionduration-60-country-de:passwordyyyyyyyyy@gate.decodo.com:7000
socks5h://user-xxxxxxxxxx-session-3-sessionduration-60-country-de:passwordyyyyyyyyy@gate.decodo.com:7000

with:
curl -x "socks5h://user-xxxxxxxxxx-session-1-sessionduration-60-country- de:passwordyyyyyyyyy@gate.decodo.com:7000" "https://ip.decodo.com/json"

I get the IPv4

in proxychains4.conf it looks:
socks5 123.123.12.12 7000 user-xxxxxxxxxx passwordyyyyyyyyy
socks5 223.123.12.12 7000 user-xxxxxxxxxx passwordyyyyyyyyy
socks5 323.123.12.12 7000 user-xxxxxxxxxx passwordyyyyyyyyy

getting http proxy:
http://user-xxxxxxxxxx-sessionduration-60:passwordyyyyyyyyy@de.decodo.com:20001
http://user-xxxxxxxxxx-sessionduration-60:passwordyyyyyyyyy@de.decodo.com:20002

resolving with:
curl -x "http://user-xxxxxxxxxx-sessionduration-60:passwordyyyyyyyyy@de.decodo.com:20001" "https://ip.decodo.com/json"

I get IPv4

in proxychains4.conf it looks:
http 321.123.123.12 20001 user-xxxxxxxxxx passwordyyyyyyyyy
http 421.123.123.12 20002 user-xxxxxxxxxx passwordyyyyyyyyy

To avoid speed problems: all proxies in my country

after getting timeout errors, changed config:
tcp_read_time_out 60000
tcp_connect_time_out 32000
and used proxy_dns_daemon 127.0.0.1:1053, starting proxychain4-daemon, firefox sandbox level = 0
still getting timeouts

When I use proxychains with tor, everything is fine.
when I use proxies from a free proxylist from the internet, everything is fine (http and socks)

So what's with my paid proxies? Or with my configuration?

[rofl0r]

no idea. apparently it's not proxychains' fault, since you confirm that it works fine with other proxies. since you seem to be using firefox, try lowering the maximum number of parallel connections it opens. the default is some crazy high value like > 100. your proxy provider might label this as abuse. might also cause other problems such as buffer bloat issues in the router. in general, a timeout of 15s should be more than sufficient for a quality proxy.