Yeah same here. I think I pissed off my manager pretty quickly at my current job by trying to change how they did certain things before getting an understanding of why they did them that way, but I realized my mistake and went into more of an observer-mindset for awhile.
Over time I built up a reputation with reducing friction in smaller ways on specific features I worked on, and then applied that same thinking to larger scale issues I saw. They were much more receptive once they knew I could make valuable contributions, and now I'm one of the main people establishing patterns and architecture decisions at my company.
Learning to establish myself for awhile before making process changes was a great learning experience that I plan to take with me to all future roles.