A serious problem, I've been fcking up cwl so bad

I remember being really good in attacking the last time I played coc before deleting it and I installed it last month and I've been screwing up attacks so bad and I really don't realise what's the issue with me, maybe I'm nervous in cwl but I surely am doing worst in CWL and i seriously don't know how I can improve it all. How did you guys deal with it if something like this happened with you?

Because I remember back in the time, I used to just look at the base and the strategy used to click just at the moment, and now I can't three star any base even if the leader guides me, how do you think I can get better?

I'd be glad to having it discussed with you guys