DW is already getting a slight nerf. Please stop asking for more.. Plarium gets a little overenthusiastic I think when it sees such requests :-). Regarding your predicament, you would say the same if you were facing 3 of any meta mechs (3 outlaws, 3 surges, etc.). So your issue is not so much with DW per se. And I say this both as a DW player and DW facer. 

My advice to you is to equip something on your outlaw that keeps it out of harm's way.. guided, pods, quasher, tetra, etc.. Don't aggressively move ahead just to apply your ability, but use it opportunistically. Also, have other mech and weapon combos handy. If it's basically game over for you when your Outlaw is done, that's an obvious limitation you should work on overcoming.

By the way, it sounds like you're facing the same set of players who are coordinating, which is a pretty unique situation. There's not much you as a solo player can do about that irrespective of whether it is DWs or not. I play and face DWs. In general, they are not incredibly difficult to deal with if you play cautiously.

i appreciated your answer but im using strike rocket outlaw but still there no way to stop more than 2 dw in the match,i just upgrading my dw to 5 star now to play duo with my brother and i just need to use my ability after his one 3s to keep captured a control point in tournament 1 death walker corpse = 2,5s of control 2 dw = alway got middle point + compete with the point at there home.

Hang in there. You'll figure it out. By the way, I don't know your SP but in general strike rocket is probably not the best option.

If you face strong coordinating mechs, expect them to be bots.

Very rarely players realy coordinate over longer time. Mostly on Hangar showdown against Seeker

Don't you have teammates? It shouldn't be all on you.

I think the Deathwalker nerf will have significant effects. Coming from someone who doesn't have one.

DW's are beatable even before the incoming nerf but it's difficult because if they activated their ability far enough from you, by the time you get to them with your compound beams (which I find work really well against most mechs when emc is cycled) then they will activate it again and each time nibble away at your HP when theirs remains the same. The nerf should make it more balanced, as now you have 7s to get to them and more often than not it's not possible - especially if they have storm racks which is the only weapon they are still shooting when they reanimate.