Why will a piece of text not change if a value linked to it via script changes?

What I would like to know: A. Why this happens B. Ways to fix it C. Is there anything I should remember about changing text using constantly changing values

My Script:

local ServerStorage = game:GetService("ServerStorage")
local Players = game:GetService("Players")


game.Players.PlayerAdded:Connect(function(player)
	local kills = game.Players[player.Name].leaderstats.Kills.Value
	local deaths = game.Players[player.Name].leaderstats.Deaths.Value	
	local killsVal = game.Players[player.Name].leaderstats.Kills
	local deathsVal = game.Players[player.Name].leaderstats.Deaths	
	
	

		
	   
		
	player.CharacterAdded:Connect(function(character)
		
		local clonedgui1 = game.ServerStorage.Deaths:Clone()
		clonedgui1.TextLabel.TextColor3 = Color3.fromRGB(255,0,0)
		clonedgui1.Parent = game.Workspace:WaitForChild(player.Name).Head			
		clonedgui1.TextLabel.Text = "Deaths: "..deaths
		
		
		
		
		local clonedgui2 = game.ServerStorage.Kills:Clone()
		clonedgui2.TextLabel.TextColor3 = Color3.fromRGB(0,255,0)
		clonedgui2.Parent = game.Workspace:WaitForChild(player.Name).Head
		clonedgui2.TextLabel.Text = "Kills: "..kills

		

		
		
		
		end)
		
		
end) 

If you are wondering what this script is doing, I made a GUI that floats above a player's head showing their Kills and Deaths. Obviously, the value is changing a lot, and I am clueless as to why the text won't change. I have tried using the following code inside the script:

killsVal.Changed:Connect(function(NewValue)
		killsVal.Value = kills
	end)
	deathsVal.Changed:Connect(function(NewValue)
		deathsVal.Value = deaths
	end)
	
	local function onValueChanged()
		if kills.Value ~= killsVal then
			kills.Value = killsVal
		end
		if deaths.Value ~= deathsVal then
			deaths.Value = deathsVal
		end
	end

but was only lead to a bunch of errors including this "leaderstats is not a valid member of Player." I would be grateful for any help.

I'm confused about this... I created a local function but it doesn't even bother to start up, and I don't know how to make it run. Excuse my blunt terminology, I am a beginner scripter.

local function StatChange(player)
		
	local stats = game.Players[player.Name]:WaitForChild("leaderstats")
	local kills = stats.Kills.Value
	local deaths = stats.Deaths.Value	
	local killsVal = stats.Kills
	local deathsVal = stats.Deaths
	local clonedgui1 = game.Players(player.Name).Head.Deaths.clonedgui1.TextLabel
	local clonedgui2 = game.Workspace:WaitForChild(player.Name).Head.Kills.clonedgui2.TextLabel

	kills.Changed:Connect(function()
		killsVal.Value = kills
		clonedgui2.Text = killsVal.Value
	end)
	
	deaths.Changed:Connect(function()
		deathsVal.Value = deaths
		clonedgui1.Text = deathsVal.Value
	end)	
	
	
end