Also what's the point of saying that minimal channel capacity is 2mBTC if it's often impossible to use the channel with such small capacity?
Fees weren't that high for many years. You tried to open a channel at a very bad moment.
If you would have opened a channel earlier, you'd be able to use it when fees were high.
I've opened the channel when the mempool blocks were cca 50 vbyte, and closed it later that day when it was 35-40 vbytes per block.
Electrum decided that it's 507 vbytes because multiplying reasons... Anyways, I've moved from Electrum, and I advise others to do so. If an average user should spend their day reading github to open/close channel, then it is a failed experiment.
(and no they don't warn you regarding the insane fee upon closing the channel)