It's totally natural to miss someone after ending a relationship with them, even if the relationship wasn't meeting your needs in some important way. If you haven't already read it, this article talks about how to cope with rough feelings after a break-up: Getting Through a Breakup Without Actually Breaking
. It may be that you and he could be friends down the line, but we generally recommend people wait until they're all the way over a break up before trying to be friends with an ex.
Dating can certainly be frustrating, especially now with the pandemic setting everything to hard mode. Can you give me a sense of how you generally meet potential partners?
I think what Alexa mentioned about incompatibility is helpful; that is, while no relationship is perfect, there are certain mismatches that mean a relationship isn't a good fit for the people involved. Things like wildly different communication needs are one of those things.