That is a problem. Kevlar level 3 makes it harder to survive on that map.
The spawns are extremely broken, even more broken on that map.
APB has more grenade spam than every military shooter that has ever existed, sacrificing mobility gets you unavoidably splash damaged before gunfights especially on the map with broken and predictable spawns.
Kevlar 3 is very situational. Best for sniping and LMG car surfing. It's handicap for these janky firefights.