Writers are told to make things hard for their characters. They must heap on the problems so that moving forward toward a goal becomes increasingly difficult for the characters. That’s good advice, but there are problems, then there are problems.
The problems presented should be logical within the plot, as well as reasonable. If a character is on the way to rescue his girlfriend from a bad guy and his car won’t start, you should have shown that his car was prone to starting problems or he’d been in a car chase being shot at earlier, and, unknown to him, his gas tank had been slightly nicked, and now a puddle of gas is on the ground.
An occasional problem may come out of nowhere, life is like that, but try to keep these down to a minimal.
Bad things out of nowhere as plot stalling tactics simply don’t work. Let your hero face obstacles that mean something, that stand legitimately in the way of his goal. Your character defeating a true obstacle means something to the reader. A false obstacle means nothing.