I get what you’re saying about wanting to use Garmin segments not Strava ones, but I don’t understand why connecting Garmin Connect to a free Strava account would break that. Regardless, using RunGap would allow you to send the Garmin ride to Strava without doing a download/upload, but I think RunGap only works on an IPhone, not Android
I’m all Garmin too, but I use an Apple phone.
Hope that makes sense! I feel like we’re talking around each other 