i always had this question in my mind that what hardforks do? they never made bitcoin faster nor lowered transactions fees
I think you missed something. Hard forks are proposed solution to Bitcoin problems but that does not mean that Bitcoin will directly benefit from it, because it is a solution that is made not for Bitcoin network but to its new network that have "Bitcoin" on its name, for example the hard forks says it will increase the block size of Bitcoin, that does not mean that they will increase the block size of original Bitcoin, instead they will make a new coin where they will implement the said solution and that is why there is a war happening between Bitcoin and hard fork coins because they are competing which is the best. But nowadays Bitcoin hard forks are now the new way to make easy money and not really solving any problem.