But does this action by the creatoe who established this new tech of ordinals is illegal? I mean does core devs can somehow fix this? Since the creator choose to use a decentralized platform for this idea.
What do you mean by illegal?
Bitcoin is open source, decentralised and clearly freewheeling as long as the basic operating protocol is not impacted. With Bitcoin, if something is doable, it can be done without any authority intervening. After that we all agree that what is feasible and can be done, is not necessarily good and should not necessarily be done...
I hate this Ordinals crap and the consequence it has on transaction costs and the congestion of the mempool.
But some people do have an interest in it: imagine you own a BTC mining pool, which does not pay transaction fees to its miners.
Imagine the profit you make when the fees are 1.5 BTC or more per block?!
I imagine that some industry players will fight to preserve this Ordinals crap at all costs.