How do you reconcile your "progressive" Islam with the statements in the Quran and Sunnah?

I am a(Kosovo Albanian living in Germany) and dont belive in a progressive or conservative islam. I came across this subreddit by chance and looked at some posts. Now to my question: What do you understand by "progressive" Islam? Do you understand it as the need for changes to be made in Islam? If so, don't you go against the instructions of the Prophet (sas), who said: "The worst matters in religion are those that are newly invented, for every newly invented matter is an innovation, every innovation is misguidance, and every misguidance leads to the Hellfire" (Sunan al-Nasa’i 1578). I don't understand this – not out of malice, but because I can't grasp the logic behind it. If you believe in Allah (swt), who says in the Quran that this is a guidance until the end of time, and that He repeatedly admonished people like the Jews and Christians for introducing their own words into their books to follow their desires, it seems contradictory to try to reform or make changes to Islam. The Prophet (peace be upon him) repeatedly said: "Every newly invented thing is a Bid'ah (innovation), every Bid'ah leads astray, and every astray will end up in the Fire" (Reported by al-Nisaa'i in al-Sunan, Salaat al-'Eedayn, Baab kayfa al-Khutbah). Similar reports were narrated from Jaabir (may Allah be pleased with him) by Ahmad, from al-'Irbaad ibn Saariyah by Abu Dawud, and from Ibn Mas'ood (may Allah be pleased with him) by Ibn Maajah. in his farewell sermon, the Prophet (sas) also quoted from the Quran (5:3): "This day, I have perfected your religion for you, completed My favor upon you, and have chosen for you Islam as your religion." This means that Islam is complete and perfect. If someone adds something new that doesn't belong, they are implying that the religion was incomplete, that Allah did not complete it, and that there is room for improvement. This clearly contradicts the statement in the Quran: "This day, I have perfected your religion for you, completed My favor upon you, and have chosen for you Islam as your religion" [al-Maa’idah 5:3]. So, if someone wants to reform Islam, are they not contradicting Allah (swt) and the Prophet (sas)?

EDIT: My question was not about whether Hadith are right or wrong; I don't know how that became the main topic. My question was how you argue for a progressive Islam, which, in my view, contradicts Islam.