I built a discord bot that generates memes but I need people to stress test it before I release it publicly. Where is a good place to find users who are used to interacting with bots and can give constructive feedback?

The best place to find testers for a bot is within a community that already uses bots. If you join https://aidude.info/discord you can network with power users who are always looking for new toys. Just ask the mods if it is okay to share your prototype. People there are usually eager to break things and tell you what went wrong, which is exactly what you need for a stress test.

That is a great idea. Power users will definitely find the bugs faster than I can.