I've edited mine for some people before for this use case and it's just a few lines, would gladly send it to you if you wish

#include maps\mp_utility;
#include maps\mp\gametypes_hud_util;

main()
{
level thread bot_lobby_monitor();
}

bot_lobby_monitor()
{
level waittill("prematch_over");

score_limit = getDvarInt("scr_war_scorelimit"); 
time_limit = getDvarInt("scr_war_timelimit");   

if(score_limit <= 0) 
{
    score_limit = 75; 
}
if(time_limit <= 0) 
{
    time_limit = 10; 
}

time_limit_seconds = time_limit * 60;
elapsed_seconds = 0;

while(1)
{
    // Check Score Conditions
    if (isDefined(game["teamScores"]["allies"]) && game["teamScores"]["allies"] >= score_limit)
    {
        wait 5; 
        force_next_random_map();
        break;
    }
    
    if (isDefined(game["teamScores"]["axis"]) && game["teamScores"]["axis"] >= score_limit)
    {
        wait 5; 
        force_next_random_map();
        break;
    }

    // Check Time Conditions
    if (elapsed_seconds >= time_limit_seconds)
    {
        wait 5;
        force_next_random_map();
        break;
    }

    // Handle Natural or Manual Break Ends
    if(isDefined(level.gameEnded) && level.gameEnded)
    {
        if(isDefined(level.forcedEnd) && level.forcedEnd)
        {
            return; 
        }
        wait 5;
        force_next_random_map();
        break;
    }

    wait 0.5; 
    elapsed_seconds += 0.5;
}

}

force_next_random_map()
{
// FIX: Manually starting the index at 0 so the array initializes perfectly
maps[0] = "mp_carrier";
maps[maps.size] = "mp_cargo";
maps[maps.size] = "mp_drone";
maps[maps.size] = "mp_express";
maps[maps.size] = "mp_hijacked";
maps[maps.size] = "mp_meltdown";
maps[maps.size] = "mp_nuketown_2020";
maps[maps.size] = "mp_overflow";
maps[maps.size] = "mp_plaza";
maps[maps.size] = "mp_raid";
maps[maps.size] = "mp_slums";
maps[maps.size] = "mp_standoff";
maps[maps.size] = "mp_turbine";
maps[maps.size] = "mp_yemen";

// DLC 1
maps[maps.size] = "mp_downhill";   
maps[maps.size] = "mp_mirage";     
maps[maps.size] = "mp_hydro";      
maps[maps.size] = "mp_skate";      

// DLC 2
maps[maps.size] = "mp_concert";    
maps[maps.size] = "mp_magma";      
maps[maps.size] = "mp_studio";     
maps[maps.size] = "mp_vertigo";    

// DLC 3
maps[maps.size] = "mp_uplink";     
maps[maps.size] = "mp_bridge";     
maps[maps.size] = "mp_castaway";   
maps[maps.size] = "mp_paintball";  

// DLC 4
maps[maps.size] = "mp_dig";        
maps[maps.size] = "mp_frostbite";  
maps[maps.size] = "mp_pod";        
maps[maps.size] = "mp_takeoff";    

random_map = maps[ randomInt( maps.size ) ];

// Change the global rotation variable so the game picks it up when transitioning
setDvar("g_gametype", "war"); 
setDvar("sv_mapRotation", "gametype war map " + random_map);
setDvar("sv_mapRotationCurrent", "gametype war map " + random_map);

// Override the UI lobby pointers directly
setDvar("ui_mapname", random_map);
setDvar("mapname", random_map);

// Command the engine to progress immediately to the rotation we just established
exitLevel( false );

}