Leave high paying job & start my own company? No desire to work, only motivated if working on insanely hard high risk high return things.

Your problem is discipline. Discipline is hard which you are consciously choosing not to master. Motivation is just a loaded term.

Motivations don't build great things. Discipline does.

I think you need to wait till you achieve financial independence, just a high paying job won't do... Maybe work your ass off till 35 yo, and then try something if you are pretty well financially. If you leave this 3L/month job, your "value" will go down in arrange marriage and also put mental pressure on old aged parents too. P.S. I have a similar situation Maybe search for a gf while you are still young and go for love marriage, find something outside work :)
Good luck

Buy a piece of land outside the city, preferably in a peaceful and safe village. Build a small farmhouse — something that gives life a purpose beyond the routine. So that whenever you get free time, you can go there with your parents and unwind.

Before joining the IT industry, I had started my own venture. But when COVID hit, I switched to IT for stability.

Interestingly, it was during those startup days that I truly learned what matters in life: a farmhouse, a few animals, some greenery, and a simple BBQ setup. That’s all you really need to feel fulfilled.

The problem is that we relied on desperation to get us into the job rather than choosing to be in it, and when the desperation of the job faded we saw that we hated the job. It has now become a cycle where you are only motivated when the situation gets really bad. And time flies by and we have no idea of what we want to do.
I am saying this because I am in the same boat. My suggestion is to watch this video, it helped me a bit - https://youtu.be/Vn0yE_1ezWQ?si=KJAPIloI6qSa7gVc

Go to your general physician and get the blood work done. Check if you have any health issues . If you don’t have any thing join a martial arts class and gym . It will give you enough motivation to open the laptop . If you ever feel you don’t like to work look at Rajnikanth even at 75 he’s working hard . He has property worth more than 500 c and still he does one movie a year . I always get my motivation to get up to work seeing him . Gym and martial arts will give you happy harmonnes

You might have adhd. Dm me. I’m in a similar boat

Go to a bank, withdraw the equivalent of your monthly salary and then take the money home. Look at it for some time. Let it be visible to you, let it be there when you cross the room.

You'll suddenly gain motivation.

Build something in parallel while doing your job. Launch within a fixed timeline, leave your job once you have 2 lakhs MRR.

A very similar story with mine when growth as a software architect stagnated, we started something of our own and looking for head of engineering role. We are at initial stage and working with a go big or go home attitude. Lmk if you are interested.

I did take a risk in my early twenties and your case is still better, firstly check your blood for low iron and b12 deficiency. Then if they are normal, you sir are in the right stage for a startup founder, but not everyone is cut out to be a founder and you can not know unless you try.

If a few years off career and low or no income is what you can risk, please heed no advice and jump into startups.

But please check your iron and b12 levels, if you are vegetarian highly likely your lack of enthusiasm is because of that, though non vegetarians also suffer from the same if their gut is not absorbing iron and b12.