I've played fh5 for a couple of months after it was released but also lost interest. Decent game though. Think I got hooked on football manager instead, but have no appetite to return to fh5 now. I didn't play any video games for 10 years until last year, if that counts for anything. The whole festival world, commentary and silly stuff was annoying. Maybe less so if you're under 18...
I'm now well into acc, started playing it a couple of weeks ago, then tried gt7 after 1.15 update. Amended settings on my wheel, but it's now total junk compared to acc physics/wheel feedback.
You really don't need to understand all the tuning, setup complexities from what I've gleaned from Google searches. If you looking to get final few tenths off your times, then yes, but default presets are apparently fine to get you to decent level and there ar decent tunes out there you can copy if you want. Main thing thats apparently inportant is tyre pressures, again they're all out there on the net. Apparently main thing is spending time getting used to cars and tracks, tuning not needed until much further down the line...
I actually find cars easier to handle than gt7, much more predictable and overall better immersion/enjoyment. Not the steep learning curve expected, but then I'm not particularly quick or looking to race online in near future.
I haven't totally written off gt7, want it to come good, so I'll be staying abreast of develpments, as like range of cars, online etc but who knows when it'll be fixed and by then may have moved more heavily into sims like acc or PC sim racing space, so gt ship may have sailed by then. If gt didn't have the issues it has at launch, probably never would have delved into other racers.