Looks like it is a Sempervivum (not 100% sure) that didn't get enough sunlight for a while and suddenly it got a lot of sunlight that sunburned it. You need to gradually increase the amount of sunlight for a plant or else they can sunburn. Also, Sempervivum are usually best kept outside. You didn't say what USDA zone you are in but most Semps are OK outside planted in the ground all year in zone 5 and some are hardier. Really, they are outdoor plants.

Your succulent is a Sempervivum:). Tbh I would just throw this guy out and here’s why. It looks like this plant had been in not enough light, then all of a sudden it was put in too much light too fast. All plants should be acclimated slowly to stronger light, even succulents.

Semps are definitely an outside plant. I have yet to see a nice Sempervivum plant grown inside. They’re very hardy down to -20F. So outside they should go;).

Next succulents need the best drainage around, and from the looks of it your mix looks water retentive. Most store bought cactus mixes are peat based which either retains water when watered too much. Then if let to dry out, which most succulents need, the peat will become hydrophobic and repell water. I find peat when dried out chokes the roots too. An easy fix is 50%-60 rinsed strained perlite or pumice combined with cactus mix.

Pots should always have holes. Can succulents be grown in pots without holes? Yes, but it’s a tricky thing. Drainage holes are a must.

Lastly if you decide to buy another Sempervivum they are monocarpic. Which means they bloom once and die:(. Most of the time they’ve produced little babies for you before they kick the bucket;).

I have a few starting to bloom now.

ps- I hope I didn’t discourage you. Low light causes weak growth and it can be hard to bring them back. I’m just trying to save you time, but if you want to see what happens with your little plant that’s fine;). Just repot in the mix I suggested, try to get all the old mix off the roots before putting in new mix, and acclimate slowly to stronger light. Morning sun afternoon shade is a good start, and tbh that could be enough sun for your Semp depending on what your climate is like. Sempervivum fry in my summer sun no matter how slowly I acclimate;)