Actually this is because quality of engineering goes down. Noone seems to be able to design a good user interface. My theory is it’s because the new generation of designers are rised on Facebook and Twitter. They never saw a good, clean UI in their lives.
You know, fighting isn’t everything. OP character can work if writer puts an actual effort into it. Look at One Punch Man or Overlord. Completely overpowered characters can be written well. It’s just that you can’t focus story on fights alone.