Living in an floor wise apartments

I 24(M), had been living in a gated floor wise society for part 13 years and had no clue what compromise one should be doing to live peacefully without involving any neighbours. Suddenly we got new neighbours all at once, from different cultures, backgrounds and the hell they brought with them.

1. They make a mess in front and back of our building
2. They acquired all the common areas and made structures so no more sunset/ sunrise / rooftop privileges
3. They have least of all basic sense of cleanliness and when it comes, they make mess for others by putting trash in front of others
4. They are so so rude, and always asks to involve in building this -that around the building, mf we want peace😞.
5. Their kids always destroys flowers/ pots of others and including ours
6. They don't help others in anyway, or compromise in any sort of way to make way for others

While my other friends who have been living since i have, says our neighbours are friendly as they haven't changed for 13-14 years. Sometimes I need to step-up but, what a student can do , he can just shout and scream at our loss