It was 3rd down, you're right about that.
Of course, you're wrong about everything else.
It was a hold. It kept the receiver from running his route. Yes, offensive holding could be called on every play. Those holds aren't anywhere near as impactful as a defender keeping a WR from running his route most of the time. And most of what the average idiot NFL fan thinks is offensive holding isn't actually offensive holding if you read the fucking rules and listen to refs talk about it. Of course, you're arguing that the rules shouldn't matter because of "Random Reason I Made Up Because I'm Mad the Chiefs Won." By your logic I could argue you should never throw a flag in the last X minutes of a game when the score is closer than Y. Or we should never throw flags on the guys that sell the most jerseys for the NFL. Hell, you're actually arguing for the games to be scripted like all these mouth breathing conspiracy theorists.
And no one cares about your family members or your weird negative outlook on their opinions, my dude.