So this is a pretty hot topic, comes up from time to time. Here’s one of the threads about the matter:
Generally, the top contenders are Illustrator, Affinity Designer and Inkscape. (Cue @rbtdanforth to talk about using gimp to do it all, thought I think he’s the only one who uses it for vector).
It comes to personal choice and cost (inkscape is free, illustrator has a monthly cost, etc).
It’s a learning curve no matter what way you go, but once you get the hang of it you can do just about anything with all of the programs I mentioned.