Is it normal to hate doing the food shopping - i need help?

I graduated from university a year ago and am now in my first job since then (At a theme park).

It's 2-2.5 hours travel each way for me and the hours can be kind of erratic. PLUS it's coming up to Fright Nights, which are REALLY REALLY REALLY busy. I could - for all I know, depending on who shows up or not - be doing up to 12 hours at work.

When at university, I could just roll out of bed/go to the local Lidl with my housemates and be set for ages.
Now, I do one of the following:

*Start on a meal plan but then can't finish it as it gets so overwhelming working out what to eat when and I'd never stick to the plan or the budget and
*Not plan, do food shopping, make a list and then get distracted by things not on the list
*Decide to cook something then not get round to it/not plan properly for whatever reason(s)
*Try and keep a mental budget for lunch in the canteen

I know what my weekly budget is for nowand I believe I know what my body is telling me to eat most of the time... but I have to think of the practical stuff too and I have to try and eat as healthily as I can.

There's a Lidl down the road from my current place as well and I can easily reach two other supermarkets... but it's so frustrating having to work out each and every little thing.

When at uni, I never had a strict budget for shopping, but I could plan what I wanted with relatively little fuss.

I still found it hard and disliked planning on some levels (Or I'd put off the shopping for ages then get round to it and massively splurge)... but I don't know what to do. Honestly.