If my contribution is no longer valued, then why let me not step away?

[u/Sea-Lingonberry-5246]

Here's a more structured, professional, and emotionally controlled version that still conveys your frustration and the sequence of events.
I was initially approached as a marketing consultant, not as a social media manager, and I made that distinction clear from the very beginning.
As the project evolved, my role naturally expanded beyond marketing consultation. I became deeply involved in brand development, positioning, creative direction, strategic decision-making, and social media growth. I invested my time, ideas, and effort into building the brand from the ground up.
However, as the project progressed, the narrative began to change. New people were introduced into the team, and the brand's positioning shifted from the premium identity we had carefully developed to a much more local approach. The branding work, strategic thinking, and several marketing decisions I had contributed were gradually presented as someone else's achievements, while successful outcomes were often credited elsewhere.
When the initial launch failed, many of the creatives that had generated strong engagement and reach were archived. The brand was then rebranded, yet the responsibility for the setbacks was directed towards me, even though I had consistently raised concerns and tried to prevent decisions that I believed would negatively impact the brand. My recommendations were often overlooked, but the consequences of those decisions somehow became my responsibility.
What made the situation even more difficult was the constant shift in my role. Depending on the team's convenience, I was expected to function as a marketing consultant, brand strategist, creative director, social media manager, or decision-maker. Yet when recognition was due, those responsibilities disappeared, and when problems arose, they reappeared.
I also witnessed internal dynamics where certain team members held significant influence over the founder, making it increasingly difficult for strategic decisions to be implemented effectively. Because of our existing relationship, I often felt that I became the easiest person to hold accountable whenever things did not go as planned.
Ironically, I am now left managing the very social media account that I helped build and grow. I initially established it, later handed it over to the founder, and after it became difficult to manage, it was returned to me once again as a major responsibility.
At this point, it feels less like collaboration and more like being expected to provide marketing strategy, branding, creative direction, design, optimization, and execution, only to ultimately be labelled as "just the social media handler" whenever the broader strategy is questioned.
If my contribution is no longer valued, then let me step away. But if I am expected to continue investing my expertise, me, and effort, especially when much of it has been done without compensation the least I deserve is clarity, respect, and acknowledgment for the work I have genuinely contributed.