Well, the first thing is that given it’s a 140mm travel bike, with what looks like fairly slack geometry, there’s no reason it couldn’t be ridden on an enduro. However, standard spec includes Altus disc brakes and Epixon rear shock, which are okay, but not something you’d see on a “decent” trail/enduro bikr. Also the wheels are Voodoo own brand. Drivetrain is mostly Deore which is fine, though the chainset being Suntour is a bit suss. The Sektor fork is at the high end of Shimano’s cheap range of air sprung forks.
Overall I’d say it’s a lot of bike for the money. The mechanic who questioned it would have been looking at brakes, rear shock, fork, wheels and chainset.
If I was you I’d spend money on new wheels first, the reason they’ve been failing is because they’re a cheap compromise to keep the price down. I’d suggest the Stans Arch Ex on Hope hubs, or just Hope hoops.
If you’re looking at a new bike then great value can be had from Bird, Commencal and Vitus (Chain reaction house brand) all of whom operate a direct sales model.
It’s worth bearing in mind that you don’t “need” a long travel fs to ride enduro. I did the ard rock on a hardtail a couple of years ago. Also, whilst being reasonably quick – but way away from the truly fast riders – I was dropped riding down Snowdon on my fs by a bloke on a hardtail..