Honestly the game is trash but just a few things I learnt from my squad battles game is dont play like your playing a real person the cpu can be rather bad or insanely good at a very quick flip of a coin.
i find breaking the cpu down offensively really depends on your patience i personally feel i have to make so many passes just to get a good look on goal.
On the defensive side try not rush a tackle i spend most of my time jockeying for the right position when on squad battles i hardly use second man press as the minute your out of position boom they make an instant impact pass that normally results in a goal.
tactically i do recommend the meta 4231 and high depth and counter passing.
the game truly sucks bro but i hope this helps good luck with your games