Oof. Mechanicus starts out ok, even has some cool mechanics but then gets utterly trivial and just keeps going like that.
Are you playing modded Xcom? I enjoyed a run with amalgamation classes, gem-based psi and lots of mods to make the enemies harder but it has been shelved for a while because the Humanity's requiem Mutons are too much to take on and I need to think about how much to sacrifice to pass missions until my weapon upgrade finishes.
It depends on what you are practicing. If it involves things out of your control, for instance poker, you definitely shouldn't adjust after every result. In the poker case that leads to not playing well just because you lost one time.
Even in less random things you have to be absolutely sure you found the problem before adjusting.