How is it possible?

Hello everyone, does anyone know if there is an update for the battles with the ships?
Because at present the balance is the most indecent I have ever seen!
Systematically lose against opponents with power inferior to mine and very kind I 69,000 against 53,000 and to any parent I deploy ship.
Are level 69 and always deploy a team with almost everything to the maximum and yet the ships of my opponents seem to have... well... immortal !!
Now they are so demoralized that I'm seriously considering abandoning this fantastic game because then there is no fun...
What good is going on?
Spend time and credits to boost a team for what?
I apologize for the outburst and my bad English but it is almost a month and a half to swallow bitter pills, including the app crash, games that seem rigged, immortal people and more...
Thanks in advance to anyone who wants to answer me.