In Team Deathmatch the combat zone is limited to the southeast corner around the Market. This is a very small area even if played with only a dozen players.
Instead of constantly running around the map and getting killed, work out a plan with your team to hold a specific area. The area around the Market is an ideal defensive position, assuming your team has enough players to lock it down.
Camp the alleys to the north and utilize the balconies on the north side of the Market to fire down on opponents in the street to the south.
When possible, avoid the street to the east, as it’s a natural kill zone for recon troops camped on the north or south ends. If snipers become a problem here, flank them from the alleys to the west and steal their dog tags.
But always keep close tabs on your squad and teammates. Otherwise this battle quickly becomes a chaotic deathmatch with no real sense of teamwork.