[electrical]

Having 15 percent equity and being able to extract it are two different things. The equity is based on hot-and-cold showdown, not hands played dynamically, and having 15 percent equity in a tiny 4-way pot is not a strong argument for continuing.

As seen in the actual hand, a crappy starting hand, while it has some equity, often becomes difficult to play later: you can't get full value when ahead and lose extra money when behind.

If you start with a crappy hand and "improve" to a marginal losing hand, you are making the implied odds work against you, something you should scrupulously avoid. While an underboat is an extreme example, making payoff hands like one or two pair are common. Dumping unimproved later is actually getting off easy in a lot of cases.

The opportunity cost of folding third is 75 cents. Losing less than that (or actually making money) by playing on will require perfect play, cooperative opponents and the cards breaking our way. Skip it and move on.