Swindon OASIS is shut down now, not sure what they're doing with it....
I live in Swindon and have done for 5 years, I moved from Bristol upto here as my wife is from here and is very family focused than me, it's alright but if I was given the choice I'd move back to Bristol... I work for the council and have visited most of the areas here and tbh they're not as bad as people make out, maybe a few years back but now it's just the young ones upto the usual stuff you get everywhere these days....
It's more the lack of any future vision/plan for the town. You'll get anti-social youths wherever you go up and down the country.
IIRC the plan for this indoor ski slope + complex was bought to the table a good 10-15 years ago, plans were given the go-ahead but they couldn't secure an investor to put up the money so the idea got shelved.
It then popped up again maybe 3-4 years ago, and again plans were given the go-ahead, i think this time round they actually did get an investor who was willing to put up the money. And of course covid happened and last i heard the investor had pulled out, so would expect the idea to get shelved again.
The problem is with the town losing big shops and big employers, it's not really a welcoming sight for an investor to plough £100mil into various projects.
As Mysterae says, it's now pretty much a commuter town for trains to Bristol/Reading/London as it's directly on the high-speed line it's got very good links in both directions.