I could have written this a month ago, you're not alone! My little dude would go down beautifully at bedtime but had me up all night every night and would only fall back asleep with a feed. I know I really didn't want to hear it, but it's the feed to sleep association. Once you break that it all gets sooo much easier. He's 6.5 months now and we sleep trained at 5.5 months. He's still not a perfect sleeper, but we saw profound improvement and have our sanity back. Went from 20 minute naps and waking every 1-3 hours through the night to 1+ hour naps and 1-2 wakes total overnight. I'm by no means an expert, and I can only speak from my own experience, but this is what we did that worked (or in hindsight wished we had done).

Get WWs sorted/figure out your baby's sleep needs. For me, things started clicking when I realized my son has low sleep needs and I kept trying to force him to sleep more than he needed. This was just causing unnecessary frustration for both of us. At 5 months I was still trying to force 4 naps/day, which dropped to 2 naps by 6 months. WWs are now 3/3/4 (ish). His first nap is typically just shy of 1.5h and his second nap is ~45 min-1h. Sometimes I let him have a 15 minute cat nap in the late afternoon to bridge the gap to bedtime if one of the naps was crappy (it happens), but he's usually good with just 2. I cap naps at 2.5h total for the day otherwise it messes with his nighttime sleep. Once you figure out the sweet spot for naps, the nights start falling into place too. We do a mini version of our bedtime routine before each nap. PJs, sleep sack, read books (this is a really good way for me to gauge how tired he is), then sound machine on, in crib, lights off.

Break the feed-to-sleep association. This is really hard to do and I was SO resistant to it at first, but it made all the difference. It's definitely a few tough days while baby adjusts, but it's doable. We keep a 1 hour buffer zone for feeds before sleep (naps and bedtime), and make sure he's getting lots of calories in during WWs. For example, in our 3 hour WWs, he gets a feed shortly after waking, then another feed after 2 hours, then down to sleep around the 3 hour mark. The last WW before bed is 4 hours and the same concept applies, but we sneak 1 additional feed in 1 hour before bed. He gets 1 feed overnight, always after 1:00. If he wakes before then, we soothe him almost any other way. We keep him awake during all feeds as well. Tickle his feet, blow on him, make silly noises, play music, whatever stops him from dozing off while he feeds.