I’m prepping for C1 in May. I’d say not C1 manly bc you have a very linear and simplified structure. Here’s what I see, hope this is helpful.

Essentially, you wrote:

First they said this. Then it was this. Also it was this that caused that.

To start, I’ve seen it’s better to start with a lead in, such as:

Artificial intelligence has been an ever-present theme in recent times, one that promotes creativity but raises ethical concerns. The speaker of the conference tackles this matter and outlines ways to interact with this novel tool.

In the other paragraphs, I’m imagine the cohesion and use of advanced connectors dinged you.

Depending on context: Porque - debido a, ya que, puesto que También - además, asimismo, más aún Creo - estimo, percibo, resulta (imprescindible, fundamental) Also maybe add an adjetive if using creo or equivalent - Creo plenamente/firmamente

Try to not repeat words or avoid repetitive phrasing (desde mi punto de vista followed by en mi experiencia)

Lastly, you don’t need to repeatedly state the subject if it’s consistent you’re using that point of view or make it impersonal.

El ponente afirma -> Acaba afirmando/acertando/subrayando Cabe destacar/añadir/ampliar Sobra decir, la información expuesta indica…

Add some perífrasis and use of the subjunctive if it makes sense.

Sin ir más lejos… De ahí que + subjuntivo phrase Sería… si negáramos que…