Search for slower research in Steam.
There is one mod that will give something like 30% slower research, which is still really fast (I play Quick as well - have the same problem you described).
There are a group of mods called Luddittian Progression or something (search for slower research as that term will lead to them, I'm not sure that Luddittian Progression is the correct name so just search for slower research). There are like four mods in this group, one has 100% slower research, the others are 200%, 300% and 400%.
I'm playing a 100% slower research game currently. It still seems kind of fast once you get your empire going, the turns to research times slid from 20+ turns to 5-7 turns (or less sometimes) once I got myself established. So you might want to try even slower.
Also, you might want to turn time victory off if you play with slow research on Quick speed as the timescale gets thrown way way off. Like, sailing gets discovered in 0AD, for instance. So if you don't turn off time victory you might get a victory/loss in 2020 AD but you're actually still in the Renaissance.