Try oiling the sleeves and see if that does anything.

As for the bar...

1) I've used one of those cheap bars with the bolt at the end. Not good. Especially when you have re tighten them from time to time and hope the sleeve doesn't fall off.

2) Waste of money if you're gonna dare to Sn or CJ with it. Passable to do strength lifts on.

3) No, don't buy it.

This seems to be the best option I could find on Amazon. I've never heard of them, who knows about the quality control and how long it will last but reviews seem ok. Only about 30$ more than your prior selection.

https://www.amazon.com/Bonnlo-Barbell-Weightlifting-Capacity-Rotating/dp/B07BXHF8H6/ref=sr_1_8?dchild=1&keywords=weightlifting+barbell&qid=1574724081&sr=8-8

https://www.amazon.com/CAP-Barbell-Olympic-Weightlifting-Renewed/dp/B07RH732VH/ref=sr_1_90?dchild=1&keywords=weightlifting+barbell&qid=1574724518&sr=8-90

https://www.amazon.com/CAP-Barbell-Power-Olympic-Weightlifting/dp/B006R4EOXM/ref=sr_1_5?dchild=1&keywords=weightlifting+barbell&qid=1574724081&sr=8-5

We used to use CAP barbells as our general purpose barbells. No idea what model but it wasn't uncommon for them to get bent over time or spin poorly.

​

https://www.amazon.com/Training-Equipment-Olympic-Barbell-Crossfit/dp/B07NZ7T1VJ/ref=sr_1_59?dchild=1&keywords=weightlifting%2Bbarbell&qid=1574724518&sr=8-59&th=1

probably the next step up but you could just pony up another 50$ and get something from Fringesport with excellent customer service and a return policy. They bought out AgainFaster a few years ago which was pretty popular in the CF community.

https://www.amazon.com/XMark-Lumberjack-Manganese-Phosphate-Powerlifting/dp/B01NBTGVNI/ref=sr_1_29?dchild=1&keywords=weightlifting%2Bbarbell&qid=1574724081&sr=8-29&th=1

https://www.amazon.com/XMark-Crowbar-Olympic-Weightlifting-Powerlifting/dp/B07T6C2ZWL/ref=sr_1_12?dchild=1&keywords=weightlifting+barbell&qid=1574724081&sr=8-12

Never heard of XMark. They have plenty of reviews though.