What are the reasons ppl rail against FL for?
I saw a guy I worked with years ago make a comment like "You can't do that on Fruity Loops!" on Instagram the other day... I think some of it is ignorance, Fruity Loops was a joke when it first came around and it seems like some people think it still functions the way it did in version 1.0. There's probably still resentment from producers that lost money to Fruity Loops, too.
Before Fruity Loops, most people producing hip-hop seriously ($$$) were using some kind of hardware to make beats - samplers, sampling synths, synth workstations and/or sound modules. To get started you're probably looking at a $500-$2,000 investment. Before making that kind of investment, there's probably a pretty good chance you had someone teach you how to produce before dropping that kind of money on hardware. In short, it wasn't something you could easily get into overnight.
Then Fruity Loops came around. Fruity Loops was the first really popular all-in-one program you could use to make beats that people felt comfortable jumping in to with no experience at all... It was also being pirated left and right, so anybody with access to a computer could make beats - no money or experience required.
Fruity Loops would be a good thing in the long run, but there was a really rough transitional period that lasted a few years.
When Fruity Loops came out there were hundreds of new producers overnight... Some good, most bad. Everybody who had Fruity Loops obviously had the internet, so they would post their stuff immediately. There was no quality control and a lot of new producers were posting bad music online. A lot of different people were even using the same pre-cut loops that were available online and making what were essentially the same beats... It was terrible. The people making bad music quickly gave "Fruity Loops producers" a bad name.
Existing producers resented Fruity Loops for a couple reasons... First of all, it took business away. Rappers didn't need to buy beats if they could make their own. Quality of the finished product suffered greatly in most cases, but out here (Bay Area) where a lot of rappers are just hustlers looking for a come up, they were OK with the quality taking a hit if it increased their profit margin. Second, Fruity Loops producers undercut everybody with their prices and that killed business for a lot of the lesser-known producers. Back then I was making so much selling beats that I was about to leave a job in software and produce full-time, but after Fruity Loops sales slowed wayyy down.
Fruity Loops was trash at first, back before VST Instruments were a thing and people were using on-board sound cards, but it seems like a lot of people still write it off like it hasn't come a long way and assume that if you're using it you're either a beginner that's just learning to make beats or shouldn't be taken seriously because you haven't "upgraded" to something else.