While the AMD Ryzen 3000 series of CPUs are highly regarded for their impressive performance and value for money, they are not without their faults. Here is a list of some of the bad things about the Ryzen 3000 series CPUs:

1. Limited support for older motherboards: The Ryzen 3000 series CPUs use the AM4 socket, which is not compatible with older motherboards. This means that users who want to upgrade their CPU will also have to upgrade their motherboard.
2. Poor stock cooler: The stock cooler that comes with some of the Ryzen 3000 series CPUs is not up to par with the performance of the CPU. Users who want to overclock their CPU will need to purchase a separate, high-quality cooler.
3. No integrated graphics: Unlike some other CPUs in the market, the Ryzen 3000 series CPUs do not have integrated graphics. This means that users will need to purchase a separate graphics card to use with their system.
4. Overclocking limitations: Although the Ryzen 3000 series CPUs have a high potential for overclocking, the overclocking headroom is limited compared to other CPUs in the market. This can be frustrating for users who are looking to get the most out of their CPUs.
5. Limited availability: Due to high demand, the Ryzen 3000 series CPUs can be difficult to find in stock. This can make it challenging for users who are looking to purchase a new CPU.

In conclusion, while the AMD Ryzen 3000 series of CPUs offer impressive performance and value for money, they are not without their faults. Users should consider these issues when deciding whether or not to purchase a Ryzen 3000 series CPU.