Heres a picture of one of the squash that has turned yellow. And just to be clear, i know squash will turn yellow lol but they shouldnt this soon

Sometimes a female flower opens up before any male blooms form on the plant, the result is an aborted squash (maybe your problem?). The yellowish leaves may indicate a lack of nitrogen, compost alone may not have sufficient N-P-K amounts. The pics seems to show a lot of shredded woody material present and that may also use up some Nitrogen in the soil. Also a lack of hours of full sunshine could lead to a weak plant if it gets too much shade during the day. Best Guesses.

Thanks for replying, i added a lot of compost and i would think that would give them plenty of nitrogen but they are yellow so i may give them a lil bit of urea fertlizer i have which is 34-0-0. I just dont wanna add too much but i also have given the plant a while to see if it would improve and nothing has happened. Thanks again

Yellow leaves can mean lack of nitrogen. It can also mean a vast number of possible stressors for the plant. Sunlight? Moisture? Disease? Squash that fall off when they're only half an inch long sound like squash female flowers that were never fertilized. As noted, these are just aborted squash. Got bees? Might try hand fertilization. Yellow leaves can also indicate that the whole stem is dying, which can happen with squash vine borers. Butternut are "resistant" to those, but hardly immune. If you've put a lot of compost in your soil at the beginning of the season, I have to doubt that this is a nutrient issue.

Thanks for responding, what i might try is giving one of those squash some nitrogen but nothing else and see if it improves. im pretty confident that it aint things like over/underwatering and they get 8-9hrs of sun a day. I will check for squash borers tho

About the aborted fruit.. that can happen if the plant isn't being evenly and well watered- too dry can cause that. Uneven or underwatering can also cause leaf yellowing. If you have a hot streak going on sometimes high temps can cause it. And watch for your pollenators- underpollination is also a possible cause. If you have good pollinators, then keep an eye on your flowers- if you have female flowers but not many males that can also cause underpollination.

If your compost was fully finished compost, I wouldn't worry about overabundance of nutes. Folks have grown squash in straight up bag of compost before- not really recommended, but it's done. Volunteer squash pop up in compost piles fine for some folks too. However, just because there is compost in there does not mean the correct nutes are there. You might still need to adjust.

See if people can grow squash in pure compost, too much nutrients should not be a problem. i did add just a lil bit of urea (34-0-0) to one of them. So ill see what happens. But we have had a hot streak(95 plus for 3-5 days) but its cooled down since then and the plant looks the same. Maybe a lil bit of nitrogen will help it. thanks for responding.

I do use a lot of compost lol. We have pretty crappy clay soil so compost helps with that. Whats even worse is shoveling all that compost. Honestly, i dont think the compost that we got was all the way done. So then its going to use up avalible nitrogen to decompose and i think thats my problem. Ive added extra nitrogen to a couple plants to test that theory.