NPC Pathfinding not working right

[depurity]

i just have to say, i know nothing about roblox AI, all i know is that roblox AI is really bad (apparently).

the AI i have “created” was a free model, but it doesnt work, it will not jump or fall of platforms, and
gets stuck easily on walls its trying to jump up on, heres a video of whats happening:

when the roblox pathfinding !!!

the AI is very bad, and doesnt work properly half the time, im just hoping that its maybe just a error from me, but it might be robloxs bad AI.
if theres any modules or scripts that already exist, or you know what the problem is, please reply, this is very important, also if it works, i will make your reply the solution. bye!

Heres the roblox script if you want it, its not mine so i dont care about it.
sorry if the script is to long, i am still pretty new to this.

local Pathfinding = game:GetService("PathfindingService")
local Players = game:GetService("Players")
local RunService = game:GetService("RunService")

local Path = Pathfinding:CreatePath({
	AgentHeight = 5;
	AgentRadius = 1;
	AgentCanJump = true;
	WaypointSpacing = 1.2;
	
	Cost = {
		Water = 100;
		DangerZone = math.huge
	}
})

local Character = script.Parent
local humanoid = Character:WaitForChild("Humanoid")

local WaypointIndex = 1
local Waypoints = {}
local ReachedConnection
local BlockedConnection
function displayPath(waypoints)
	local colorwalk = BrickColor.White()
	local colorjump = BrickColor.Blue()
	local colorclimb = BrickColor.Green()
	for index, waypoint in pairs(waypoints) do
		local part = Instance.new("Part")
		
		part.Anchored = true
		part.CanCollide = false
		part.Size = Vector3.new(1,1,1)
		part.Transparency = 0.5
		part.Position = waypoint.Position
		part.Parent = workspace
		if waypoint.Action == Enum.PathWaypointAction.Jump then
			part.BrickColor = colorjump
		end
		if waypoint.Action == Enum.PathWaypointAction.Walk then
			part.BrickColor = colorwalk
		end
		
		local Debris = game:GetService("Debris")
		Debris:AddItem(part, 0.1)
	end
end

local function findTarget()
	local maxDistance = 500
	local nearestTarget
	
	for index, player in pairs(Players:GetPlayers()) do
		if player.Character then
			local target = player.Character
			local distance = (Character.HumanoidRootPart.Position - target.HumanoidRootPart.Position).Magnitude
			
			if distance < maxDistance then
				nearestTarget = target
				maxDistance = distance
			end
			
			if distance < 5 then
				nearestTarget.Humanoid:TakeDamage(0)
			end
		end
	end
	
	return nearestTarget
end

local function followPath(destination)
	
	local success, errormessage = pcall(function()
		Path:ComputeAsync(Character.PrimaryPart.Position, destination)
	end)

	if success and Path.Status == Enum.PathStatus.Success then
		Waypoints = Path:GetWaypoints()
		displayPath(Waypoints)
		
		BlockedConnection = Path.Blocked:Connect(function(blockedWaypointIndex)
			if blockedWaypointIndex >= WaypointIndex then
				humanoid:MoveTo(Waypoints[WaypointIndex].Position)
			end
			ReachedConnection:Disconnect()
		end)

		--blocked connection
	    ReachedConnection = humanoid.MoveToFinished:Connect(function(reached)
			if reached and WaypointIndex < #Waypoints then
				WaypointIndex += 1
				if Waypoints[WaypointIndex].Action == Enum.PathWaypointAction.Jump then
					humanoid.Jump = true
				end
				humanoid:MoveTo(Waypoints[WaypointIndex].Position)
			else
				ReachedConnection:Disconnect()
				BlockedConnection:Disconnect()
			end
		end)
		WaypointIndex = 2
		humanoid:MoveTo(Waypoints[WaypointIndex].Position)

	else
		warn("Path not Computed!", errormessage)
	end
end

while wait() do
	local target = findTarget()
	if target then
		print(target.Name)
		followPath(target.HumanoidRootPart.Position)
	end
end