I had Saturday jobs while at school and uni but I chopped and changed them regularly as I hated them all. Mostly stacking shelves or working on tills in supermarkets.
You have to adjust your expectations. Why didn't you like any of those jobs?
You have to look for positives in jobs and find something you like about each one.
I worked in a shop. Not my dream job. I found pleasure in the working hours, the staff discount, some team members, and actually being quite good at retail. I was there full time for 1 year.
I worked in a fast food van... really not my dream job. Hated the grease and the working hours (5am get up!). I found pleasure in learning a new skill (the 'cooking') and the customer interaction. Also I got better and better at adding up orders in my head and not having to use the calculator as much. I made it into a game. I worked Saturdays in uni term time and more full time in the holidays, over 3 years.
I worked in a factory putting crisp packets into multipacks. Again, not great. I pretended I was a robot and thought about other things. This was my least favourite job and I only did it for about 4 months full time.
What I'm trying to say is, unless people are being horrible to you, work isn't that bad. You can find enjoyment in the most mental of tasks, take pride in doing them well, enjoy interaction with clients or colleagues.