Phrases I hear in Church that confuse me: "God is always faithful" or "God has never failed you/let you down"

These are phrases and terms that I've encountered in more and more churches over the last 10-15 years, and they confuse me a bit because they seem to be intentionally leaving out information to get across a concept that I don't think is biblical (if anyone has any way to back up these phrases, let me know).

Off-hand, I think that the concept in the Bible is that God is faithful to His own plans and desires, but the idea that God is inherently faithful to humans isn't something that I know actually exists in the Bible. This is the difference between saying "God will never work counter to his goals" versus "God will never do anything to disrupt your life".

The second phrase, "God has never failed you/let you down" seems to be repeated more and more, but, again, from a human perspective that's clearly not true. From Job's perspective, he repeats on many occasions that God has let him down based on the expectations he had for God and how he assumed God operated. Many MANY Christians are let down or feel like God has failed/betrayed them at some point or another. This is kind of like if you had a ballet recital and your parents never showed up and someone said "Your parents have never let you down.". Obviously, this would not be a very helpful phrase. The better question/statement would be "is there a reason as to why they weren't there?".

Either way, let me know if anyone has any biblical backing for the two phrases that I hear a lot, because at this point they kind of sound like Biblical gaslighting or intentionally misconstruing scripture in a way to sell people false expectations of what being a Christian is or isn't.