Just make a loadout to fend for yourself when you're playing with randoms.
When I'm playing with randoms, my loadout look like this:
Weapons
Enforcer Pistol
Skills
Covert 3 (can't be marked, can't see me when I crouch)
Agility 3 (crouch walk fast, climb fast, and players can barely hear your foot steps)
Execution 2 (get an additional shiv whenever you craft one)
Play style: Let everyone else occupy the opposing team, the tool boxes are priority, FLANK, FLANK, FLANK.
The shivs and molotov throws I get on nikkas are hilarious. They don't see me coming