Are any of these servers what you are looking for?

Servers with "Deathmatch" in the name:
24/7 ScoutzKnives (w/ DeathMatch)
TimetoKill.net - CS:GO Deathmatch GunGame | 128 tick | gameM
- #01 Xtreme Addictions CSGO [DEATHMATCH]
Gangpeng CS:GO Deathmatch 2
Tagless Gaming 24/7 Gungame Deathmatch
ausgamer.org CS:GO #09 Deathmatch ^ Hosted by CCGL.org
BattleForce.cz #42 | GUNGAME | DEATHMATCH | HlStatsX | NEW M
[JP][FFA-DM] DeathMatch Geek [No Teammates]
GECLAN.NET - DEATHMATCH 24/7 - 128 Tick
www.psyG.eu | #03 | Deathmatch Dust2 Only