I haven’t bought computer speaker setup in well over a decade, but getting back into gaming, any suggestions?
I ask, due to the fact it looks like the old brands are all over the place in quality these days, like the Logitech G560 Speaker System, whose required software is messy. https://a.co/d/00gehZRS
Which is really making me wish I kept up to date, as Amazons current “recommendations system” can’t be trusted for quality with so many being cheapo speakers and SEO ruining result searches. 
Thanks in advance, as I feel like I’ve awaken in a speaker dystopia. 😧
The most important parts are missing from your question.
How much money are you willing to spend? Do you just want small 2 way speakers or small + subwoofer or 3 way speakers?
As someone else mentioned, KRK can be pretty good value but decent active studio monitors start around the 200$ area at the minimum. This site is my go to for audio stuff https://www.thomannmusic.com/active_nearfield_monitors.html
I have been happily using a pair of Fostex PM0.4C that i got on sale for 250€ but i dont know how availability is wherever you are.
This Focusrite Scarlett Solo is THE standard audio interface you will find in many budget or mobile audio studios, but this is not really needed for most people. https://www.thomannmusic.com/focusrite_scarlett_solo_4th_gen.htm
Hate to jump in on someone else’s question and ask for advice, but what would you suggest for around or under $100? On a budget but getting back into gaming. TIA.
I mean for gaming, headphones are always better imo, but if you want speakers then personally i would go for used ones at that price range.
You will just get much more value for you money, but you will need to have a bit of patience to get a good deal.
Honestly even a mini amp with some random passive speakers will be a better experience than whatever active speakers you can get for 100$.
I once installed this type of thing for someone that found some passive speakers in the trash and was really strapped on money.
26€ Stereo Amp Board (Amazon)
30€ Stereo + Sub Amp Board (Amazon)