Well... I have been reading around the forum, and those things spoke about like changes, trolls, nerfed.... are things that existed way back itself. Maybe they have become more apparent to people with time and those people got the perception that certain things were not there at all before. For example, my team won many trophies (unexpectedly) during the periods I stop playing seriously where I left it fully abandoned or sometimes half abandoned (just coming online to check what was going on out of curiosity). It even went to win a double and a treble with no management (no attendance, no training, no boosting of fitness or morale, no countering and so on). It was as or was easier to win trophies this way than playing the game seriously and putting all this effort in attending, managing and so on. So, many undesirable things existed in the past and some things were enforced with time for whatever reasons.
What has not changed are those things the Greek user posted - look for fast trainers, train them and also avoid strong opponents. The first two are the main basics that even a newbie or the average guy can do and is expects to get better results.