[Buzz]

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so I decided to just be safe and see the river by calling.

[/ QUOTE ]T50 - Correct.
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I could not fold that river getting 30 to 1 almost, even though I was sure I was beat.

[/ QUOTE ]Correct. Well... almost sure.
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Even though the river was pretty awful, I still feel like I overplayed it.

[/ QUOTE ]You didn't overplay the river. You overplayed the turn.
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I had no reason to think Villian was THAT dumb.

[/ QUOTE ]He merely overplayed his flopped trip sevens. As you move up in limits that will happen less and less often.
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Also my low draw was definitely tied by at least one other player

[/ QUOTE ]Not necessarily. I think you usually (3/5) will win all of low, but will be tied roughly two times out of five.
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Best case scenario against a reasonable set of players probably would have been 1/4.

[/ QUOTE ]Best case scenario from where? After the turn you're hoping for a favorable river card, but you didn't get one. On the river, you're hoping Villain has been bluffing or semi-bluffing (or simply somehow playing incorrectly, which seems to have been the case) and that your set of sevens with an ace kicker will hold up for high. Turns out Villain got lucky on the river instead of you.

Buzz