The answer to this question depends almost entirely upon which government has legal authority over you and your marriage (for example, the US government maintains authority over any marriage on its books, even if you got married abroad and haven't lived in the US for decades), which cultural community you live in, and/or which religious community, if any, you belong to. Some countries, governments, and cultures are better for marriage than others and are also subject to your own personal preference as far as where you want to actually live and whom you wish to be surrounded by.
Another factor is your current financial situation and where you think you will be economically/financially in the future. If you have never been successful and/or wealthy and don't see yourself being so at any point in the future (and especially if you see yourself as being so far beneath your wife that you could potentially be awarded palimony in the nigh inevitable divorce), then you might not have much to lose unless your wife falsely accuses you of something at some point, something which is entirely possible and, in such an event, you would be facing criminal charges.
Third, it is a known and documented fact that a heterosexual married household with traditional gender roles is generally (obviously barring some weirdness like alcoholism) the healthiest environment for children to grow up in and produces offspring which are more likely than any other to be successful in life in all of the ways in which success is typically measured (emotional stability, decent socio-economic future trajectory, generally low rates of childhood abuse at home, etc.)
As to why people on this forum in particular generally have a negative view of marriage, consider that most of us are probably Western men from Anglosphere countries (US, Canada, UK, Australia, and New Zealand). Anyone with even a vague knowledge of the dominant culture in the Anglosphere and the general treatment of men in society, the family, the court system, and so on will understand our view. Frankly, most of us would probably have liked to have marriage as an option but, as it stands currently, it is culturally and legally an extremely dangerous and possibly even lethal (poverty, suicide, and incarceration) thing to attempt so long as we remain in our respective homelands.
This is not even considering the near impossibility of managing a household in a traditional fashion with an Anglo woman (regardless of ethnicity) or even with a foreign woman who has spent significant time in the Anglosphere. Your home life as a married man in the Anglosphere will almost invariably become a more profound and singular misery than even your worst year as a single man was. The potential, and entirely theoretical, benefits are vastly outweighed by the real and near-certain perils. It is not necessarily that we have a negative view of marriage as a concept (in fact, I estimate that most of us find it to be a positive thing in principle if for no reason other than creating a healthy environment for children) so much as it is that we have a rational view of the legal state of marriage in our home countries and of the cultures which dominate those countries and make said legal situation possible.
This is barely scratching the surface of why men, especially those of us who are younger and raised by feminists, do not see sufficient benefit in it for us to warrant an attempt at marriage but what of the children? What sane man would, if he had any other option, voluntarily elect to inflict this dystopian fever dream onto innocent and impressionable children? What sane man would wish to get married, likely primarily for the purpose of creating a family, when he knows that he will never have any sort of meaningful legal or cultural authority or power to ensure that they are raised properly and are psychologically traumatized, and chemically discombobulated as little as possible during that process?
Here is an American family law attorney's calm and measured take on the situation in an interview with a Canadian divorced dad:
Here is another take on the situation (3 and half minute animation) from an American female forensic psychologist who does well in touching on some of the big issues:
*As a side note, it is often said that married men are, on average, statistically more likely to be happy and content with life than single men. This is false and is based on a statistical trick by which those performing a particular study do not count divorced men as part of the "married" group or even as being in their own group entirely but instead as part of the "single" group. Anyone who has met a recently divorce man will know how depressed they tend to be (understandably) and why they would drive the average happiness score of the "single" group down. Academia and peer review are just as infected and overrun by Feminism and Postmodernism as everything else.
*As another side note, marriage may still be fine if you live in a non-Anglo country whose law and a dominant culture are friendly toward married men and you are not still under the authority of an Anglo government (for example, the US government hold Americans to its laws regardless of where we actually reside, including subjecting us to income tax on income we earned entirely outside of the US while also living permanently outside of the US), then heterosexual marriage has always been and remains objectively the best common way to build a family and raise children.
It's not that marriage sucks. It's that marriage in certain countries and cultures sucks.