Yaakov had previously reacted by rebuking the actions of Shimon and Levi when they destroyed Schem (Bereishit 34:30):
וַיֹּאמֶר יַעֲקֹב אֶל-שִׁמְעוֹן וְאֶל-לֵוִי, עֲכַרְתֶּם אֹתִי, לְהַבְאִישֵׁנִי בְּיֹשֵׁב הָאָרֶץ, בַּכְּנַעֲנִי וּבַפְּרִזִּי; וַאֲנִי, מְתֵי מִסְפָּר, וְנֶאֶסְפוּ עָלַי וְהִכּוּנִי, וְנִשְׁמַדְתִּי אֲנִי וּבֵיתִי.
...and later in VaYechi, Yaakov negatively references the behaviour of Shimon and Levi in the blessings (Bereishit 49:5):
ה שִׁמְעוֹן וְלֵוִי, אַחִים--כְּלֵי חָמָס, מְכֵרֹתֵיהֶם. ו בְּסֹדָם אַל-תָּבֹא נַפְשִׁי, בִּקְהָלָם אַל-תֵּחַד כְּבֹדִי: כִּי בְאַפָּם הָרְגוּ אִישׁ, וּבִרְצֹנָם עִקְּרוּ-שׁוֹר. ז אָרוּר אַפָּם כִּי עָז, וְעֶבְרָתָם כִּי קָשָׁתָה; אֲחַלְּקֵם בְּיַעֲקֹב, וַאֲפִיצֵם בְּיִשְׂרָאֵל.
Even Yosef when he had told his dreams to his family, Yaakov retorts to Yosef rhetorically "me, your mother and brothers are going to prostrate ourselves to you?" (Bereish 37:20):
וַיְסַפֵּר אֶל-אָבִיו, וְאֶל-אֶחָיו, וַיִּגְעַר-בּוֹ אָבִיו, וַיֹּאמֶר לוֹ מָה הַחֲלוֹם הַזֶּה אֲשֶׁר חָלָמְתָּ: הֲבוֹא נָבוֹא, אֲנִי וְאִמְּךָ וְאַחֶיךָ, לְהִשְׁתַּחֲוֹת לְךָ, אָרְצָה.
Why then doesn't Yaakov at least challenge his sons for lying to him about the whereabouts of Yosef, which had caused him so much anguish? His reaction seems disproportionately passive. (Bereishit 45):
כו וַיַּגִּדוּ לוֹ לֵאמֹר, עוֹד יוֹסֵף חַי, וְכִי-הוּא מֹשֵׁל, בְּכָל-אֶרֶץ מִצְרָיִם; וַיָּפָג לִבּוֹ, כִּי לֹא-הֶאֱמִין לָהֶם. כז וַיְדַבְּרוּ אֵלָיו, אֵת כָּל-דִּבְרֵי יוֹסֵף אֲשֶׁר דִּבֶּר אֲלֵהֶם, וַיַּרְא אֶת-הָעֲגָלוֹת, אֲשֶׁר-שָׁלַח יוֹסֵף לָשֵׂאת אֹתוֹ; וַתְּחִי, רוּחַ יַעֲקֹב אֲבִיהֶם. כח וַיֹּאמֶר, יִשְׂרָאֵל, רַב עוֹד-יוֹסֵף בְּנִי, חָי; אֵלְכָה וְאֶרְאֶנּוּ, בְּטֶרֶם אָמוּת.
One may say that he was caught in the moment and was so happy of the good news that he didn't rebuke his sons. But this is difficult, since we never hear a word of rebuke even at a later stage. If one were to say that Yaakov saw the hand of God despite their negative actions, and it was a blessing; you could say that about any bad thing that happens i.e. Hashem has a plan which comes to pass through negative things in any case. But this doesn't mean that we are 'ok with' those bad things, or poor decisions.
