Hello @Ramsk, some comments:
We all try our best to follow the rules, but nobody is perfect and the list of rules is very long. I suggest you show us some examples of your hidden reviews, so possibly some other local guide or moderator can give you some tips. Otherwise nobody can help you.
It is not only the question whether the photos are genuine, but more importantly whether they contain something which should not be published (recognizable faces or inserted text for example) or which does not help any user of Googel Maps (selfies for example or completely “off topic”).
Besides of what I said above, the SPAM filter can also make mistakes.
Nobody here on Connect is able to do that and Google never tells us, why exactly a contribution was hidden. The only help we can offer, is giving tips how to avoid hidden contributions. I suggest to read @MortenCopenhagen’s series of articles How to Get In and Out of Trouble: The Main post as a starting point.