Happiness is weird and different for each culture. If you have time I do recommend this Ted talk about the science of happiness.

If you feel happy while reading or fishing in a creek or risking your life free climbing - those things are all valid. Tho the last one in my mind isn’t really sane and 100% healthy mind.

The only thing is not acceptable is when some twisted people get joy from others suffering. But technically speaking their happiness is real - even if they are not fit to be part of society.

Depends on how much complaining the OP does. If he is always moping about girls then he has no right to tell the parents to butt out. Because he is burdening them with negativity - so they have the right to try make things better.
If he mentioned it once in six months in passing, now that’s a different matter.

What is art and what is commercial product?
Most art is definitely divorced from the artist. Do you know the artist of your favorite App Icon on your phone? Do you have any idea where or by whom was your favorite car designed?
Where is the line when/where it is actually matter of the identity of the artist?
The other day I was reading magazines from the early 1900s. Some of the ad-art is 100% questionable by today’s standards, meanwhile they were put on paper with colored ink when both things were really expensive.
For some people it matters of what kind of sexual orientation the artist has. And you don’t have to go too far where woman’s art is not considered anything of value.
So at the end does it matter? Just vote with your wallet if someone’s ‘artiste’ persona is one that you don’t like.