You have to give allowances for umpires in the field making split second decisions it is natural they will make mistakes, it's what DRS is for.
But the behaviour of the third umpires has proven them to be biased in favour of the home team imo.
There is absolutely no excuse for "missing" no balls etc.
Spending five minutes poring over a close decision that isn't going their way, desperately trying to find a reason to reverse the decision.
While taking 5 milliseconds over a close one going theirs because they don't want to find anything.
Also for people saying it's all in fans heads, I recall Bob talking about a tour of Australia where the home umpires gave England nothing.
I may be mistaken but I believe he said England didn't get a single LBW decision given against Australia on the entire tour.