With tools (and most things in life) you get what you pay for. So bad quality issues, is by buying quality/professional brands.

It also depends on how you use them. If you like to DIY and lot, you might need a more extensive tools and higher quality tools. Good quality tools will generally last for decades if not a life time (unless abused), a few exceptions do apply. So see them as investment for the future. Good tools are also less likely to strip bolt and such, saving you time and money.

A kit is a good way to buying a large assortment of tools for a lower price than buying them separately. However you never get everything you need, it's always an assortment of the most common one. Fine for most jobs, until you find a job which requires just a size larger or smaller then that came with you kit. Those nice boxes with little shapes in them for each tool never have spare space for more tools and the those boxes are something not to care for. Buy a separate quality toolbox, I bought a cheap one and the closure would occasionally pop open while carrying and dropping my tools everywhere.

A other way to collect a good assortment of tools Is by buying kits of separate type of tools. They provide you with a wide range of sizes. So for example:
- A kit with ¼ ratchet, sockets, extensions, etc.
- A kit with 3/8 ratchet, sockets, extensions, etc.
- A pack of screw drivers
- Pack of wrenches
- Pack of allen keys
Etc.

Wait for good deals and shop around.