Internships at 2 Big 4's but cant get a full time IBD role

Please can somebody help me understand and guide me as to what I am doing wrong and what I could do to improve my chances of landing a full time role in IBD?  I am really disappointed I have received a rejection from LSE for MSc Finance. I have just turned 30, and it's been 6 years since I graduated with a 2:1. I did a 4 year Microbiology degree from a non russel group in UK and working in the NHS is not something I want to do at all. 

Here is a general timeline:

- Pivoted after graduation, networked and managed land an internship in M&A at a boutique firm in India for 4 months and started working on healthcare projects specifically.

- Managed to land another internship for 3 months at EY M&A healthcare lead advisory in the same country. 

- Went back to the UK in May 2020 and managed to find work at a start up Fin Tech for 9 months. The start up couldn’t survive the pandemic and had to be shut down. 

- Couldn't find work and had to Pivot to the NHS temporarily in December 2020 and started vaccinating, ended up doing it for 8 months. In the meantime, enhanced my CV with doing a quantitative course (further statistics and econometrics) at the LSE summer school and Oxford Said private markets online, and signed up for FMVA and started preparing for GRE + GMAT. 

- Applied to Imperial Msc Finance and Oxford financial economics, got interviews for both but couldn’t land an offer. 

- Took some months off to travel and figure out options. 

- Started to get unwell during the travel but found another opportunity in Bangalore Infotech in Feb 2023, joined for the short term but during this time, I found I had cancer and other health issues. I eventually ended up going part time and had to stop working at one point.

- It’s taken me 18 months, surgery and multiple investigations, physiotherapy and treatments to start functioning normally again. 

I reapplied to LSE MSc Finance in December 2024 with a Gre score of 166 in Quant & Verbal and 1 AWA and have just received a rejection. 

Now I’ve finally managed to reach a point I can start working again and I have networked again and landed an off cycle internship at PWC in Bangalore but I’m unsure of how to progress from here and break into IBD.

For all intents and purposes my family and life is in the UK and I want to live here but I just can’t seem to get hired, nor have I been accepted at a masters or an MBA programme. I feel stuck and Im at a loss for what I'm doing wrong. I know a good starting point would be retake the GRE, Im scheduled to take the GMAT next week and so far im scoring in the 700+ range but what else can I do to improve my chances of an offer for either B School or to land a full time role?