how kick people with leaderstats?

You could use coroutine, if you know what that is. Or you could just do a while loop.

local Counter = "Deaths"

game.Players.PlayerAdded:Connect(function(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

    local deaths = Instance.new("IntValue")
    deaths.Name = Counter
    deaths.Value = 0
    deaths.Parent = leaderstats

    while wait() do
        if deaths.Value >= 5 then
            player:Kick("You Have Died Too Many Times!")
        end
    end
end)

This is the simple way, a while loop.

Here is the coroutine way.

local Counter = "Deaths"

local checkDeaths = coroutine.wrap(function(player,deaths)
    while wait() do
        if deaths.Value >= 5 then
            player:Kick("You Have Died Too Many Times!")
        end
    end
end)

game.Players.PlayerAdded:Connect(function(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

    local deaths = Instance.new("IntValue")
    deaths.Name = Counter
    deaths.Value = 0
    deaths.Parent = leaderstats

    checkDeaths(player,deaths)
end)

Either way works! Hope this helped!

local player = game.Players.LocalPlayer
local char = player.CharacterAdded:Wait()
local stats = player.leaderstats
local deaths = stats.Deaths
local remote = workspace.Script.RemoteEvent

if deaths.Value == 5 then
    player:Kick("You have died too many times!")
end

this is a local script, put it in starter pack, it should fix your issue.

This would work if not for the fact you're only checking the 'deaths' value once. You could either put a loop of some sort in to continually check the value, but that's not very efficient. It would be better to put the check right after the player dies and you increment the value.

First ditch the original check if statement on line ten.

Now change the death code instead of this:

local d = true
Character:WaitForChild("Humanoid").Died:connect(function()
    if (d) then
        d = false
        deaths.Value = deaths.Value + 1
    end
 end)

It could be this:

local d = true
Character:WaitForChild("Humanoid").Died:connect(function()
    if (d) then
        d = false
        deaths.Value = deaths.Value + 1
    if (deaths.Value >= 5) then --//Checking right after the player dies
        Player:Kick("You have died too many times!")
    end
    end
 end)

Far more efficient.

this works, I tested it

game.Players.PlayerAdded:Connect(function(plr)
    local leaderstats = Instance.new("Folder",plr)
    leaderstats.Name = "leaderstats"

    local deaths = Instance.new("IntValue",leaderstats)
    deaths.Name = "Deaths"
    deaths.Value = 0

    plr.CharacterAdded:Connect(function(char)
        char:WaitForChild("Humanoid").Died:connect(function()
            deaths.Value = deaths.Value + 1
        end)
        while true do
            wait()
            if deaths.Value >= 5 then
                plr:Kick("You have died too many times, "..plr.Name)
            end
        end
    end)
end)