The game has had to put up with ham-fisted decisions from time to time for the past 150 years or whatever it is.
We might find them annoying, frustrating and at times gut-wrenchingly devstating - but any conclusion it's led to the game overall being 'ruined' would be dismissed by any sensible person as utter nonsense.
I'd also question the 'teething problems' conclusion.
VAR is always going to be a system where someone has to stop and take time to review an incident where the correct decision might not be quickly evident. On what basis are you assuming that this will ever change, beyond anticipating the invention of a decision machine that can review incidents of subjectivity and conclude beyond reasonable doubt what the correct course of action would be in next to no time at all?
Because there really isn't ever going to be a machine that can adjudicate whether something is a penalty or not within a 99.97% accuracy. It'll be a guy, looking at a screen with various angles that may or may not contradict each other, in a situation that may or may not take a long time to reach a conclusion on, if a conclusion can be reached at all. That's what it is mate. It isn't a 'teething problem'.
Besides all that if you took every goal and looked at every incident leading up to that goal and declared that a video referee can look at every incident (slight shirt tug earlier on in the movement, suggestion of offside with the cross, suspicion of climbing, whether an incident earlier on was really ball-to-hand and not hand-to-ball) then many goals that stand today will be ruled out. Ignoring every other argument for the time being, a situation where every goal has to jump through hoops to prove that it stands legitimately and that there were no infringements or incidents at any point in the period of play that meant that the game should have been stopped 10 seconds, 45 seconds, 3 minutes (etc) earlier, seems the definition of absolute shite to me.
Short of goals that are scored within seconds of the restart, there's probably any number of 50/50 calls, or review-worthy decisions in the lead up to the majority of goals scored.