Star Citizen and DayZ were the two games that taught me to avoid buying early access games at all cost.
Part of the reason I liked the mod so much was because of how unpolished it felt, the ui sort of stapled on top of the Arma ui, everything a little janky and you're plunged into a hostile zombie world. Funny how something unpolished can feel more appropriate.
I only buy early access if the product is already worth the money at the time I buy it. For example factorio was already a great game when I bought it, but only hit 1.0 several years later.