I know that “boneh” is one of the melahot that are forbidden on Shabbat. I assume, but was never certain, that destructing things that you have built — such as disassembling furniture — is also issur on Shabbat and hagim. Thank you in advance!
In general you are right, but there are a number of factors that might change the halacha. Therefore each instance has to be evaluated on its own.