You mix apples and oranges again. There is nothing in the EU anticompetition law that will hinder a takeover as such. x86 is not the only CPU uarch out there.
Also you forget the basics of the mergers you mention. Tmobile and Orange sat on 2 licenses after the merger. So its natural that they need to give up one. Thats nothing special in that, so dont try and bend the reality there.
BT got the coppernetwork for free, just like TDC and others. Hence why a government regulatory sets the wholesale prices on the network.
No it didnt get the copper wire for free at all. BT have always owned it since it was public owned.
BT also invested its own money in exchange technology and cabinets they built for their broadband network. When BT was privatised there was no Broadband. The UK and EU forced BT to open its network to competitors.
Why are you still talking about x86 vs ARM vs who ever? Its not relevant.
Whats important is that inside your laptop is an X86 Intel or AMD CPU. For this reason alone they wont allow the purchase. Then there is the enterprise sector and their workstations and laptops which yet again ALL work on windows x86. No way will governments allow intel to have 100% of this market. Then there is the server market with IBM quitting x86... Intel yet again wont be allowed to own the entire market.