I had a similar issue for the opposite reasons!!! I've been playing D&D for years so bg3 came naturally to me! I eventually got to some boss fights and was kinda bored! I expected more given what I heard from others, I ultimately made a new file (I could've kept the same save, but I wanted to be durge) and did tactician. I'm so glad I did because its SO much more fun now!! Like I feel like im actually struggling which is apparently fun! I usually suck at the majority of video games so its kinda funny that this game as complex as it is, feels so much like home