I didn't say I did it "regularly," only after the player started abusing it.
But, I mean fair enough; that's as good enough of a reason to quit a group as any other. The DM could also ask the player to leave, or remove the Guidance cantrip from the game, or house-rule it into impotency...and all of them look unfair from the player's perspective (to varying degrees, depending on the player). They aren't breaking any rules, so it's always going to feel like they are being punished for "using good tactics."
The Guidance cantrip doesn't need fixing at everyone's table. And for those that need it, not everyone is going to fix it the same way. I find the best fix is an invisible one. The table in the DMG suggests a DC 15 for a "Medium" challenge; I use 17 instead. (shrug)