You're comparing the imperfect reality of an actual situation (unemployment benefits) against the utopian fantasy of an imagined best case scenario (UBI) – of course the imagined scenario will come out on top. The real result of a UBI will almost certainly look less rosy than the picture you paint, just like every other plan once it gets implemented. For example, this:
> noone would be jealous that you are freeloading because everyone gets UBI
would likely be wrong, because people would instead be jealous because you're "freeloading" by not working and therefore not paying taxes. Other ways a UBI could conceivably be bad or even worse than the current status quo:
* Prices rise due to increased consumer spending capability, to the point where you have to work again to get above the poverty line.
* Any realistic UBI is too low for people with special needs (like disabilities), so you'll again need a bureaucracy to deal with those cases.
* If the UBI is independent of local cost-of-living, it'll most likely be too low to survive on it in high COL areas, like most large cities. If it's dependent on COL, the exact implementation won't please everyone.