My results cannot be explained. In 30 seasons I have never seen anything like this. I do not mean 1 match, many matches this season against clearly weaker teams i'll have 60-65% possession, much higher passes completed, all my bonuses at 8-10%, plus I'll be in attendance and my opponent not, and still get outshot. I have almost the exact same team that won CL last season and was 26-0-0 in league, and all my critical players are still there and still 6-7 stars.
Last season using the same lineup/orders, a typical game I'd hold about 65% possession (I have tons of friends that support me and almost always are +15%), and would average about 20 shots to opponent's 8. Against my main rivals it would be closer to equal, which is expected.
If it were just me I would perhaps be able to say: Ok I guess this team needs to be changed, or maybe I just don't have it this season, but when I also have friends who have won triples in the last season or 2 and have been playing 20+ seasons as well report the same thing, it really makes you feel something is wrong.