OP wrote:
"I have a late 2014 Macmini 8GB. It’s always been slow but now it’s just excruciating. I don’t use it for anything fancy - just simple stuff. It’s using 12.7.6 Monterey. Is there any way to make it faster or should I give up and buy a newer version."
You didn't tell us what kind of drive is inside.
Fusion?
Platter-based HDD?
SSD?
The cold fact is... it's reached the end of its useful life.
8gb of RAM, perhaps coupled with a slow HDD or fusion drive, coupled further with the demands of virtual memory disk swapping for the OS, are what's slowing it down to a crawl.
You can't really "fix" this.
The memory is soldered in and not upgradeable.
If the drive isn't an SSD, you
could put one in, but I predict it will help only incrementally, not greatly.
As you said, it's time to "give up and buy a newer version".
I'd suggest an Apple-refurbished m4 Mini from their online store:
You want:
m4 (m4pro probably overkill for your needs)
16gb of RAM (standard, although 5 years down-the-road it may again seem "cramped". I picked 32gb for mine). You could also choose 24gb.
512gb of SSD storage (at least... DO NOT choose 256, TOO LITTLE).
For my own Mini, I picked an Apple-refurbished m4, 32gb RAM, 1tb SSD. That should last 5, 6 years easily.