I am not sure about firebird but I am having an autonomous sensory meridian response while eating roast lamb laced with fresh mint sauce

How long for ??? Do you mean forever

I don't think OP is far off. Most people on here, and any dating site for that matter, are not really happy, bored (and thus not happy), and lonely (and thus not happy) and still struggling with some old pain they never dealt with (and thus not happy).
Not necessarily one of these, more likely a mixture of these 4, in various degrees.

It's not exclusive to dating sites btw. It's like that almost everywhere, certainly online, even on spiritual forums where you expect -and hope- to find positive and happy people.

I'm not sure about your country but here there's lots of things you can do in the community to help with loneliness.

If you're talking about being lonely for someone special in your life, then yes, I believe most experience being lonely for that from time to time.

I admit there are times when I have, although that's my own doing because I can't expect to meet someone if I don't go anywhere.

The sites, like Mingle, are nice for social interaction and can help with loneliness but the only thing that truly helps is being proactive with inviting other's into your life. That means either actively seeking online or getting out in public and participating in social gatherings that focus on singles so you can meet single women/men.

I agree too, since what was stated was "someway" lonely.

There is no reason to seek out interaction with others (most especially strangers or shallow relationships) unless there is "someway" feelings of loneliness, or it's necessitated by another purpose (e.g. to do what you need to do for a job/hobby and interaction is necessary to accomplish that).

Since the sole purpose and function of this site is interacting with people in someway (directly, indirectly via viewing profiles/posts, or passively) then in order to come here there is some desire and a conscious willing choice to interact with people.

But if you are defining "someway lonely" or "lonely" as desperately lonely, or wallowing in loneliness, then I'd disagree.

Any seeking out of interaction with others is driven by "someway" degree of loneliness (unless driven by ulterior motives, like to ask for money, then the money can be the motive and people are perceived to be the easiest path to that money and there is no loneliness involved, although a case could be made that there is in "someway" a level of loneliness which influenced the person to perceive other people as a means to money and they are seeking out the interaction as an additional fulfillment).