genital piercings. (NSFW)

Hmm...not that I can recall, have I been with someone with clitoral or vagina piercings.
I've been with those with nipple piercings, which didn't bother me at all.

Nor would I think I'd be bothered by or care about VCH jewelry...frankly I find it lovely and intriguing, if not stimulating in a mental sense.

IMHO, those men were fools and being selfish. IT likely wasn't causing them any true irritation...but it was a distraction from their own self pleasure in a mental context.
Some, if they're not familiar or practiced with something...or if it's not focused on THEIR pleasure, rebel or resist an idea or situation.

It's actually very common, for emotionally insensitive people (man or woman) to say something THEY don't know is "stupid" or it somehow irritates them. (sexual or non-sexual, in ALL contexts IRL)
Being dismissive or otherwise is a default state for many. Believe me, I've grown up with it...with all the non-common likes I've had.
That, and people are just friggin' weird about sex. There is so much baggage in the world, it's ridiculous.
Welcome to 2021, you'd think we'd be better by now.

I say, age is irrelevant. You do you.
If it gives YOU pleasure, then keep it. (esthetically or truly sexually...either way)

And I'm sure many on this board would agree, man or woman.

Sooner or later, you'll find the partner that takes pleasure from it.

 

I've never had a VCH so have no direct experience, but I do have about thirty years of pretty regular sexual experience, so here are a couple of thoughts: How long between the guy 3 back and these two guys? You mentioned 'getting up there in age,' could something about you have changed? Perhaps producing less natural lubrication could cause irritation...
Were your last two guys bigger than the ones before? Or maybe a different penis shape or angle. I get a different sensation, especially when it enters or leaves my pussy, from a mushrooms headed cock compared to a banana shape where the head is smaller than the shaft.
Are these guys important to you, or just casual sex? I want my guy to take pleasure along with me. If I don't want to pleasure him, then I probably don't really value that relationship.
Could you try a different smaller VCH? Something just big enough to keep the piercing open. See if that makes a difference. If I liked the guys I wouldn't want this to turn into a pissing contest about "don't tell me what to do with my body."
Good sex can involve trade-offs just like anything else.