How resilient / decentralised is Ethereum?

Coming from someone that isn't too tech savvy crypto-wise, how safe is Ethereum in the long run? Amidst increasing pushback from governments worldwide as well as those who wish to gobble up as much control as possible, is Ethereum decentralised enough?

My understanding so far (and please correct me if I'm wrong) is that Bitcoin is the most decentralised asset in the entire space, followed by Ethereum and then after that various other protocols.

So far it's easy to see that Ethereum has stood the test of time but predicting the next 10+ years is incredibly difficult in crypto. Hypothetically if a collaboration of powerful entities were to use everything in their power to either take control of the network or influence the functioning of Ethereum, could they do so? With the move to proof of stake this is the one thing which concerns me and I admit that it may be due to not understanding it properly.

I love Ethereum and wish to see it remain decentralised outside of the control of governments and corporations, but is it decentralised enough to do so?