Well, 'life sucks visual novel' could be centered around stories where the characters experience all kinds of setbacks in life. It might show how they deal with things like failed relationships, career problems, or personal insecurities. Maybe it uses a visual novel's unique style of storytelling, with text, images, and choices to explore these themes.
There's no easy answer. If it has a small but dedicated fan base within the visual novel community, it could be considered somewhat popular in that specific circle. However, without more information on its sales, reviews, or overall reach, it's hard to say for sure.
One 'mom sucks story' could be about a mom who is overprotective. For example, she doesn't let her child take any risks, like trying out for the school play. As a result, the child grows up lacking confidence in exploring new things. This teaches us the importance of balance in parenting, not being too overbearing.
I don't know the main characters as I've not come across this story. But if Tee is in the title, Tee might be one of the main characters, and of course, the snakes are likely to be important characters as well.