Yeah, like with every PES scripting can be annoying, especially conceeding in last two or three minutes, where trying to defend at all costs and leaving the joystick aside makes no difference when computer unlocks his superpowers.Depends a lot on how you set the team up and having players that suit how you play. I was generally getting to 60+ goals in the league even in the first season but mostly by knowing in advance what set up worked for me and what players to buy/use.
Even then there's still the odd games you just aren't allowed to win. For example every single one against Liverpool. For some reason this game thinks Origi is the greatest footballer of all time.
Been doing some googling when I posted here, and the only thing that helped me a lot so far is watching the team spirit while picking players and formation before the game. For example, making Bruno captain instead of Maguire raises the team spirit by 4, which is a lot. I completely forgot about team spirit, luckily someone posted about that on some site, and players play far better when it's around 95 than below 90.