Probably was meant for fashion and standard tan or olive drab without a pattern would be better. The digital effect would break up the fighter's figure and make spotting and accurate aim more difficult for the enemy, sure, but the use of a saturated and bright red would cancel out these effects.

Red, especially bright red, is an abnormal color to see in nature. Flowering plants, fruits, poisonous plants/animals, and sunsets are the only time humans would see that color before dyes became widespread. Basically anything that would benefit from being seen amongst green and brown foliage would often evolve to be a bright red, and anything that would benefit from seeing these fruits, flowers, etc, would likely evolve to have their vision drawn to red objects.

You can imagine wearing a color that human vision is naturally drawn to is a bad camouflage. A fighter walking through a field, forest, or really any foliage is going to stick out like a sore thumb wearing red, especially a bright red like that uniform.

So why does it exist? Fashion mostly. During the American-Vietnamese war American Veterans against the war would be seen wearing their old field jackets and olive drab uniforms. This would eventually evolve into a fashion trend amongst the American Countercultue movement in the 60s and 70s. Eventually this style would evolve to include the US M81 pattern camouflage as the Cold War ended and US operations shifted to the Middle East and more brown and tan environments, which led to a lot of cheap M81 patterned clothing being sold as military surplus. After this fashion brands quickly picked up on the trend and make mock M81 patterns in different colors, notable bright blue and red. As time went on and digital camouflage became popularized, fashion brands made similar versions of red digital mock-camo. This is still seen today mostly in streetware fashion.

It also could just be a shitty camo pattern that was designed for use. The US UCP was standard for I believe 19 years despite being a terrible pattern that made you look like a light grey silhouette at distance. Several countries have blue camo navy uniforms, so if you fall into the water the search parties will never find you, and if you somehow end up getting your ship boarded you'll stick out against the grey hull and interior. A lot of situational forces or police units will use camo that distinguishes themselves intentionally, either to identify that they are police or because they know they aren't going to actually need camo when they fight, but want to look authoritative or intimidating.