How to negotiate a pay raise (cybersecurity analyst)

I have been working at my current company for about a year now. I joined the company with the understanding that I would be learning a lot and being paid less than market value. At that time, I didn't mind being paid less; I joined on 3.5 LPA in Bangalore. After that, in December, I got an appraisal, which put my CTC at 4.4 LPA. Since everyone on my team knows what I'm capable of, I asked for the hike.

I have been doing a lot of valuable work, such as automation, and I've filed patents as well in my final year project at my university. I have also been assigned all of the challenging tasks because my team knows that I am capable of handling them.

I recently asked my manager for a raise. I asked for a 100% raise, which would bring my salary close to 9 LPA. My manager said that he would consider my request, but he eventually came back with an offer of a first 15% and then 25% raise.

I believe that a 25% raise is still too low. I am looking for a job where I am paid what I am worth. I am confident that I can find a job that pays me 9 LPA or more.

I just wanted to know some second thoughts: am I doing something wrong in the negotiation, or should I approach it in a different way?

Not to denigrate others, but I know my teammates carry 2-3 years of experience, but I'm still the one coming up with new ideas and how to solve the problem, and I'm delivering it. Many times, my manager even said he always has higher expectations of me than others.

The excuse my manager is giving is that it doesn't matter; if you join on a higher package at some other place, you'll have to return the joining bonus here of 1 lakh (I'm leaving before 18 months, so), plus after paying taxes, the equation becomes equal, so he's suggesting to wait until December and then look for other options.