Chainring bolt stuck in 105 FC 5800 chainring
The bolts are sacrificed - they'll be for the bin once you get them out.
Since they're only finger tight it could be crossed thread, or possibly bad tolerances.  Could also be brand new threads somewhere with poor cleanup leading to galling, so some assembly paste might have helped.



Start with simple things before breaking out the leverage bar.


Warm the chainring/spider/bolts area with a hairdryer (ie warm not hot) or leave it in bright warm sunlight for a couple hours.
Put down a drop cloth then add some penetrating oil around the bolts.  Leave it for 8-12 hours and repeat for a couple of days.
Now try your tool and see if they come loose easier.


Since the fitment is stripped, you may find another tool fits better.  An old flathead screwdriver can sometimes be used as a chisel to force a slot.  Same goes for Torx/star drivers - they are excellent at cutting a channel with some hammer blows.   Expect to break/damage the torx bit.


Another option is to use a Dremel and a cutoff wheel to cut a slot into the chainring bolts.  Then the big flathead screwdriver has something to fit into.  Risk of damaging other parts.


If the shoulders of the bolt head are visible, you might be able to get some pliers on the sides and undo them that way.

Sometimes two clean dry fingers/thumbs will work - one either side pushing together may rotate them.

Getting more brutal, you could purchase an "easy out" screw extractor kit.  To use these you need to drill a hole into the bolt and then reverse an extractor into the hole which will eventually bite and unscrew the bolt.   https://en.wikipedia.org/wiki/Screw_extractor

Nasty time - you may be able to weld a bolt into the stripped bolt to give you something to grab.  Personally I've never had success doing this.

Last resort might be to put a chain on the bike and then pedal about the yard, not a road.  Stay firmly seated!  Ideally this will produce enough rocking motion to back out the bolts, at least enough to slot or to grab with pliers.