75 on dissertation in 4 days

So I just received my dissertation mark and feedback and I got 75!!! That is crazy to me because I rushed it in 4 days having done one of my interviews 2 days before the deadline! I am so grateful and proud however I worked out that I will be graduating with a 2:1 regardless. Don’t get me wrong, after the dissertation I was just praying I’d graduate in general but after receiving such a high mark for it I kinda feel like I could’ve done better in my previous assignments. I didn’t attend a single lecture or seminar in the second term and I attended like a total of 3 last semester so throughout this entire year I did everything from home. I think if I had actually gone in to a few more my low 60s could have become high 60s or even low 70s giving me a first? I don’t know, I’m happy I’m graduating and I completely understand that 2:1 is an amazing result but I keep thinking I could’ve just put a little more effort in :/ anyways just a thought.