Who's making you buy all these stamps? No one, really. I buy contemporary U.S. stamps only when I like the design or the subject matter. The others I don't buy. Try it. It's not hard. Instead of buying a hundred new U.S. stamps every year, I buy maybe twenty or thirty, the best of them all. I mount them on blank pages because I see no reason to be chained to my album after a certain cutoff year. Anyone can do this. Buy what you like, and don't buy what you don't like. It's a free country, and all that. Stop complaining that you're being forced to buy all these stamps you don't like.
What Drew said!
Self-adhesives are something of a paradox. As a mailer I love them and as a collector I hate them. I believe they are generally popular with the public, a return to "lick and stick" would not be well received, and this is one genie that will never be put back in the bottle. As annoying as they are I'm not going to stop collecting stamps, countries, or topics I like just because of self-adhesives.
I purchase the U.S. mint commemorate set each year (now called the Stamp Yearbook with Collectible Stamp Packet). Except for se-tenant sheets individual stamps only are provided. This is probable not the least cost approach but mounts are included and one is not buying entire sheets. If I have to purchase an entire sheet or booklet at the Post Office I can cut out a single or singles to mount and use the rest for personal postage (yes I know, people don't postal mail as much anymore). Or, churches and other organizations still do some mailing to their members and I've donated stamps in lieu of a monetary contribution … where there is a will there is a way is my motto.
As for modern designs, I don't care much for the "pop-culture" themes (such as Dragons and Scooby-Doo), but "Honoring First Responders" (9/3/18), "Post Office Murals" (4/10/19), "State and County Fairs" (7/25/19), as well as the Transcontinental railroad issue fit in with the commemorative's issued from the 1930's onward.
My local post office (99330) is small, rural, and has a single Postmaster/Clerk, yet it carries all regular stamp issues so I'm uncertain why other post offices might not? One thing about them, because it is a small P.O. they don't receive a large quantity of each issue and if they sell out they don't reorder as new issues are always coming in. Periodically (each quarter I think?) they are supposed to return any stamps issued before a certain date (I'll have to ask how old next time I'm there), so I've learned to buy stamps I like sooner rather than later after the issue date.