There is now ay to fix if one spoke against a Talmid Chacham? What if one had bad influences in his early life he taught to be kosher, but with time and maturity knows now better?

Yes, there is teshuvah, but you need to understand something very clearly: this is one of the most serious sins a person can commit, and the teshuvah is extremely difficult. The Gemara in Masechet Shabbat teaches us that anyone who disrespects a Talmid Chacham, there is no cure for his ailment. This is not a light matter. When you speak against a Talmid Chacham, you're not just insulting a person - you're going against the Torah itself. The Talmid Chacham represents the Torah. When you dishonor him, you're dishonoring HaKadosh Baruch Hu. The Chachamim tell us that a person who does this has no share in Olam HaBa and is considered in the category of someone who has desecrated the words of Hashem until they do teshuvah. Now, can you do teshuvah? Yes, but it requires much more than a simple apology. If the person you offended or hurt is a Talmid Chacham, no amount of saying "I'm sorry" is enough on its own. You need to say "I'm sorry" for the rest of your life until they forgive you. You have to go to them and ask for mechilah - forgiveness. Do whatever you can to get their forgiveness. The Gemara says in Masechet Yoma that if somebody goes against a Talmid Chacham and embarrassed him in public, the Talmid Chacham should not just let it go. Some Talmidei Chachamim may have a little fire in them and they don't want to forgive you easily. You have to keep trying. Why? Because you hurt one of Hashem's soldiers, and you have a very, very serious problem. As for your situation - that you were influenced by bad early life influences but now know better - that's good that you recognize it now. But you still have to do the teshuvah. The fact that you were influenced doesn't erase the sin. The four steps of teshuvah still apply: stop the sin completely, recognize that what you did was wrong, feel genuine remorse and confess it to Hashem, and reach a level where Hashem can testify that you've done teshuvah. For this specific sin, you also need to publicly apologize if you publicly shamed the Talmid Chacham. If you spoke against them publicly, you have to apologize publicly. You can't just do it privately. And you need to increase your limud Torah - your Torah learning. That's part of the tikkun for this type of sin. Listen, the fact that you're asking this question shows you're heading in the right direction. But don't take this lightly. Start doing the teshuvah today. Go get their forgiveness. And fix yourself completely.