Switching to a new address after every transaction is not feasible because of the high transaction fees. Not to mention the transaction time.
I don't understand what you are saying here.
Why would using a new address for the change from your transaction have any effect at all on the transaction fees or the transaction time?
To reduce fees, you may want to consider moving your bitcoins to a SegWit address.
The problem here is majority are using these 3rd party wallet packages on the internet that place the fee's,
I use the Bitcoin-CLI (cmd line) to do my transaction, I set my feed schedule to zero, and I rarely see fee's, thus I know it can be done,
IMHO its just the day-traders that are generating 1,000's of 0.0001 BTC trades a day complaining about 0.002 BTC fee's, the problem is people just don't take the time to learn the software, its all there testnet, to learn, and minimal fees that are selectable by the user, but people choose to use these fancy GUI platforms that set the fee's and most likely give the user a hair-cut to boot.
Conversation here is about 'loss' in BTC, most loss occurs at the exchange or wallet, from malicious or sloppy software, and the fee's is just another example, they just don't care, but if you did care you would learn to set the fee schedule yourself.
If you keep our private-keys off the exchanges or away from wallet-software, if you keep your keeps on a closed system, running your own node, I don't see how you could lose money, unless you did it on purpose, the bitcoind&bitcoin-cli software seem pretty solid, but I gather from the comments on these forums that 99% of the users are just putting their private-keys into the hands of third party's.