Do you have more reason against / pro PoW / PoS?
There is one more major issue with Proof-of-Stake. Stakers can hold a piece of the "pie" forever. In Proof-of-Work, if you own 1 EH/s, then you own 0.1% of the hashrate, hereby 0.1% of the "pie". However, if more miners join, and hashrate increases, then your fraction of the pie gets less. You cannot indefinitely own a constant fraction of the pie, as opposed to Proof-of-Stake, where owning 1% of the staked coins gets you always 1% of the votes.
clogging the mempools with ordinals
There is absolutely no relation between Proof-of-Work and clogged mempool.