I have made a lot of good decisions when it really mattered. The difference is "when" - indicating a single point of time in the past, simultaneous with each of the decision points. The two parts of this sentence have no temporal relationship to each other.
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Dominik6There are things I have done in my life, and I was always ready to face the consequences.The sentence borders on a non-sequitur, but that aside, the tense sequence is anomalous to my ear.
Dominik6Every time this year I have played against him I have won.I would change that thus: I have won every time I have played against him this year.