Is medicine worth it? What a big question!
1) Medical school - hard work for sure. Way harder than A levels. But, at the same time, more rewarding than A levels a lot of the time. If patients are what you want to be dealing with then, there are good bits of medical school. There are a lot of exams - loads. Lots of people fail exams or don't do as well as they were used to doing. You might need to resit during the summers. But I think most people have a great social life as well at med school. Medical students are renowned for working hard and playing hard and I think this is a fair reflection of most. I know loads of medical students at the moment and see plenty more at my work and, generally speaking, most of them are happy most of the time and some of them are having the time of their lives.
2) Foundation years - are tough. Really tough. You have almost no control over where you end up. If you are married/living with someone, you can't guarantee being anywhere near them. If your partner is also a medic, also doing foundation years, it's even harder. It's hard work, long(ish) hours, not much control over holidays/breaks. It used to be worse in terms of hours, but it used to be better in terms of teamwork and camaraderie whilst at work. BUT it's 2 years and then that's over. (If you have kids you can choose where you train but that's not a great reason to have kids at medical school! I know people who have done it but it's really hard).
3) Specialty training - also tough but can be less tough depending on the specialty you choose. If you choose an over-subscribed specialty then you have little choice about where you end up. If you choose an under-subscribed one you will be luckier. It's a lot of years of working nights/weekends and still having little control over holidays etc.
But
Then you get to be a GP or a consultant and have (probably) a bit more control over your life.
The pay is not good, compared with other sectors such as law or management consultancy or big pharma, but it's not bad either.
At the end of the day, it's about whether you can imagine yourself doing anything else. I do not always enjoy my job but I enjoy the bits that count (the bits where I genuinely make a difference to people) and I can put up with the other bits for that. I don't regret my decision but I do think it's harder now than 30 years ago when I was training.