It's one of the worst Linux desktop programs I use daily. It gets scaling a bit wrong so all the icons look blurry, scrolling in chats regularly breaks (scroll wheel just does nothing but is fine in all other programs), and the one time I tried to video call in it it crashed. Discord's client is much better.
For what it's worth, Telegram's scaling on windows is also broken. Use it with one 100% and one 200% scaling monitor, on the HDPI everything is too small to read.
